drivers/scsi/scsi_transport_fc.c

   1 /*
   2  *  FiberChannel transport specific attributes exported to sysfs.
   3  *
   4  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ========
  21  *
  22  *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
  23  *    Rewrite for host, target, device, and remote port attributes,
  24  *    statistics, and service functions...
  25  *    Add vports, etc
  26  *
  27  */
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32 #include <linux/kernel.h>
  33 #include <linux/bsg-lib.h>
  34 #include <scsi/scsi_device.h>
  35 #include <scsi/scsi_host.h>
  36 #include <scsi/scsi_transport.h>
  37 #include <scsi/scsi_transport_fc.h>
  38 #include <scsi/scsi_cmnd.h>
  39 #include <net/netlink.h>
  40 #include <scsi/scsi_netlink_fc.h>
  41 #include <scsi/scsi_bsg_fc.h>
  42 #include "scsi_priv.h"
  43
  44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
  45 static void fc_vport_sched_delete(struct work_struct *work);
  46 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
  47         struct device *pdev, struct fc_vport_identifiers  *ids,
  48         struct fc_vport **vport);
  49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
  50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
  51 static void fc_bsg_remove(struct request_queue *);
  52 static void fc_bsg_goose_queue(struct fc_rport *);
  53
  54 /*
  55  * Module Parameters
  56  */
  57
  58 /*
  59  * dev_loss_tmo: the default number of seconds that the FC transport
  60  *   should insulate the loss of a remote port.
  61  *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
  62  */
  63 static unsigned int fc_dev_loss_tmo = 60;               /* seconds */
  64
  65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
  66 MODULE_PARM_DESC(dev_loss_tmo,
  67                  "Maximum number of seconds that the FC transport should"
  68                  " insulate the loss of a remote port. Once this value is"
  69                  " exceeded, the scsi target is removed. Value should be"
  70                  " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
  71                  " fast_io_fail_tmo is not set.");
  72
  73 /*
  74  * Redefine so that we can have same named attributes in the
  75  * sdev/starget/host objects.
  76  */
  77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)                \
  78 struct device_attribute device_attr_##_prefix##_##_name =       \
  79         __ATTR(_name,_mode,_show,_store)
  80
  81 #define fc_enum_name_search(title, table_type, table)                   \
  82 static const char *get_fc_##title##_name(enum table_type table_key)     \
  83 {                                                                       \
  84         int i;                                                          \
  85         char *name = NULL;                                              \
  86                                                                         \
  87         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
  88                 if (table[i].value == table_key) {                      \
  89                         name = table[i].name;                           \
  90                         break;                                          \
  91                 }                                                       \
  92         }                                                               \
  93         return name;                                                    \
  94 }
  95
  96 #define fc_enum_name_match(title, table_type, table)                    \
  97 static int get_fc_##title##_match(const char *table_key,                \
  98                 enum table_type *value)                                 \
  99 {                                                                       \
 100         int i;                                                          \
 101                                                                         \
 102         for (i = 0; i < ARRAY_SIZE(table); i++) {                       \
 103                 if (strncmp(table_key, table[i].name,                   \
 104                                 table[i].matchlen) == 0) {              \
 105                         *value = table[i].value;                        \
 106                         return 0; /* success */                         \
 107                 }                                                       \
 108         }                                                               \
 109         return 1; /* failure */                                         \
 110 }
 111
 112
 113 /* Convert fc_port_type values to ascii string name */
 114 static struct {
 115         enum fc_port_type       value;
 116         char                    *name;
 117 } fc_port_type_names[] = {
 118         { FC_PORTTYPE_UNKNOWN,          "Unknown" },
 119         { FC_PORTTYPE_OTHER,            "Other" },
 120         { FC_PORTTYPE_NOTPRESENT,       "Not Present" },
 121         { FC_PORTTYPE_NPORT,    "NPort (fabric via point-to-point)" },
 122         { FC_PORTTYPE_NLPORT,   "NLPort (fabric via loop)" },
 123         { FC_PORTTYPE_LPORT,    "LPort (private loop)" },
 124         { FC_PORTTYPE_PTP,      "Point-To-Point (direct nport connection)" },
 125         { FC_PORTTYPE_NPIV,             "NPIV VPORT" },
 126 };
 127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
 128 #define FC_PORTTYPE_MAX_NAMELEN         50
 129
 130 /* Reuse fc_port_type enum function for vport_type */
 131 #define get_fc_vport_type_name get_fc_port_type_name
 132
 133
 134 /* Convert fc_host_event_code values to ascii string name */
 135 static const struct {
 136         enum fc_host_event_code         value;
 137         char                            *name;
 138 } fc_host_event_code_names[] = {
 139         { FCH_EVT_LIP,                  "lip" },
 140         { FCH_EVT_LINKUP,               "link_up" },
 141         { FCH_EVT_LINKDOWN,             "link_down" },
 142         { FCH_EVT_LIPRESET,             "lip_reset" },
 143         { FCH_EVT_RSCN,                 "rscn" },
 144         { FCH_EVT_ADAPTER_CHANGE,       "adapter_chg" },
 145         { FCH_EVT_PORT_UNKNOWN,         "port_unknown" },
 146         { FCH_EVT_PORT_ONLINE,          "port_online" },
 147         { FCH_EVT_PORT_OFFLINE,         "port_offline" },
 148         { FCH_EVT_PORT_FABRIC,          "port_fabric" },
 149         { FCH_EVT_LINK_UNKNOWN,         "link_unknown" },
 150         { FCH_EVT_VENDOR_UNIQUE,        "vendor_unique" },
 151 };
 152 fc_enum_name_search(host_event_code, fc_host_event_code,
 153                 fc_host_event_code_names)
 154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN  30
 155
 156
 157 /* Convert fc_port_state values to ascii string name */
 158 static struct {
 159         enum fc_port_state      value;
 160         char                    *name;
 161 } fc_port_state_names[] = {
 162         { FC_PORTSTATE_UNKNOWN,         "Unknown" },
 163         { FC_PORTSTATE_NOTPRESENT,      "Not Present" },
 164         { FC_PORTSTATE_ONLINE,          "Online" },
 165         { FC_PORTSTATE_OFFLINE,         "Offline" },
 166         { FC_PORTSTATE_BLOCKED,         "Blocked" },
 167         { FC_PORTSTATE_BYPASSED,        "Bypassed" },
 168         { FC_PORTSTATE_DIAGNOSTICS,     "Diagnostics" },
 169         { FC_PORTSTATE_LINKDOWN,        "Linkdown" },
 170         { FC_PORTSTATE_ERROR,           "Error" },
 171         { FC_PORTSTATE_LOOPBACK,        "Loopback" },
 172         { FC_PORTSTATE_DELETED,         "Deleted" },
 173 };
 174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
 175 #define FC_PORTSTATE_MAX_NAMELEN        20
 176
 177
 178 /* Convert fc_vport_state values to ascii string name */
 179 static struct {
 180         enum fc_vport_state     value;
 181         char                    *name;
 182 } fc_vport_state_names[] = {
 183         { FC_VPORT_UNKNOWN,             "Unknown" },
 184         { FC_VPORT_ACTIVE,              "Active" },
 185         { FC_VPORT_DISABLED,            "Disabled" },
 186         { FC_VPORT_LINKDOWN,            "Linkdown" },
 187         { FC_VPORT_INITIALIZING,        "Initializing" },
 188         { FC_VPORT_NO_FABRIC_SUPP,      "No Fabric Support" },
 189         { FC_VPORT_NO_FABRIC_RSCS,      "No Fabric Resources" },
 190         { FC_VPORT_FABRIC_LOGOUT,       "Fabric Logout" },
 191         { FC_VPORT_FABRIC_REJ_WWN,      "Fabric Rejected WWN" },
 192         { FC_VPORT_FAILED,              "VPort Failed" },
 193 };
 194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
 195 #define FC_VPORTSTATE_MAX_NAMELEN       24
 196
 197 /* Reuse fc_vport_state enum function for vport_last_state */
 198 #define get_fc_vport_last_state_name get_fc_vport_state_name
 199
 200
 201 /* Convert fc_tgtid_binding_type values to ascii string name */
 202 static const struct {
 203         enum fc_tgtid_binding_type      value;
 204         char                            *name;
 205         int                             matchlen;
 206 } fc_tgtid_binding_type_names[] = {
 207         { FC_TGTID_BIND_NONE, "none", 4 },
 208         { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
 209         { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
 210         { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
 211 };
 212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
 213                 fc_tgtid_binding_type_names)
 214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
 215                 fc_tgtid_binding_type_names)
 216 #define FC_BINDTYPE_MAX_NAMELEN 30
 217
 218
 219 #define fc_bitfield_name_search(title, table)                   \
 220 static ssize_t                                                  \
 221 get_fc_##title##_names(u32 table_key, char *buf)                \
 222 {                                                               \
 223         char *prefix = "";                                      \
 224         ssize_t len = 0;                                        \
 225         int i;                                                  \
 226                                                                 \
 227         for (i = 0; i < ARRAY_SIZE(table); i++) {               \
 228                 if (table[i].value & table_key) {               \
 229                         len += sprintf(buf + len, "%s%s",       \
 230                                 prefix, table[i].name);         \
 231                         prefix = ", ";                          \
 232                 }                                               \
 233         }                                                       \
 234         len += sprintf(buf + len, "\n");                        \
 235         return len;                                             \
 236 }
 237
 238
 239 /* Convert FC_COS bit values to ascii string name */
 240 static const struct {
 241         u32                     value;
 242         char                    *name;
 243 } fc_cos_names[] = {
 244         { FC_COS_CLASS1,        "Class 1" },
 245         { FC_COS_CLASS2,        "Class 2" },
 246         { FC_COS_CLASS3,        "Class 3" },
 247         { FC_COS_CLASS4,        "Class 4" },
 248         { FC_COS_CLASS6,        "Class 6" },
 249 };
 250 fc_bitfield_name_search(cos, fc_cos_names)
 251
 252
 253 /* Convert FC_PORTSPEED bit values to ascii string name */
 254 static const struct {
 255         u32                     value;
 256         char                    *name;
 257 } fc_port_speed_names[] = {
 258         { FC_PORTSPEED_1GBIT,           "1 Gbit" },
 259         { FC_PORTSPEED_2GBIT,           "2 Gbit" },
 260         { FC_PORTSPEED_4GBIT,           "4 Gbit" },
 261         { FC_PORTSPEED_10GBIT,          "10 Gbit" },
 262         { FC_PORTSPEED_8GBIT,           "8 Gbit" },
 263         { FC_PORTSPEED_16GBIT,          "16 Gbit" },
 264         { FC_PORTSPEED_32GBIT,          "32 Gbit" },
 265         { FC_PORTSPEED_20GBIT,          "20 Gbit" },
 266         { FC_PORTSPEED_40GBIT,          "40 Gbit" },
 267         { FC_PORTSPEED_50GBIT,          "50 Gbit" },
 268         { FC_PORTSPEED_100GBIT,         "100 Gbit" },
 269         { FC_PORTSPEED_25GBIT,          "25 Gbit" },
 270         { FC_PORTSPEED_64GBIT,          "64 Gbit" },
 271         { FC_PORTSPEED_128GBIT,         "128 Gbit" },
 272         { FC_PORTSPEED_NOT_NEGOTIATED,  "Not Negotiated" },
 273 };
 274 fc_bitfield_name_search(port_speed, fc_port_speed_names)
 275
 276
 277 static int
 278 show_fc_fc4s (char *buf, u8 *fc4_list)
 279 {
 280         int i, len=0;
 281
 282         for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
 283                 len += sprintf(buf + len , "0x%02x ", *fc4_list);
 284         len += sprintf(buf + len, "\n");
 285         return len;
 286 }
 287
 288
 289 /* Convert FC_PORT_ROLE bit values to ascii string name */
 290 static const struct {
 291         u32                     value;
 292         char                    *name;
 293 } fc_port_role_names[] = {
 294         { FC_PORT_ROLE_FCP_TARGET,              "FCP Target" },
 295         { FC_PORT_ROLE_FCP_INITIATOR,           "FCP Initiator" },
 296         { FC_PORT_ROLE_IP_PORT,                 "IP Port" },
 297         { FC_PORT_ROLE_FCP_DUMMY_INITIATOR,     "FCP Dummy Initiator" },
 298 };
 299 fc_bitfield_name_search(port_roles, fc_port_role_names)
 300
 301 /*
 302  * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 303  */
 304 #define FC_WELLKNOWN_PORTID_MASK        0xfffff0
 305 #define FC_WELLKNOWN_ROLE_MASK          0x00000f
 306 #define FC_FPORT_PORTID                 0x00000e
 307 #define FC_FABCTLR_PORTID               0x00000d
 308 #define FC_DIRSRVR_PORTID               0x00000c
 309 #define FC_TIMESRVR_PORTID              0x00000b
 310 #define FC_MGMTSRVR_PORTID              0x00000a
 311
 312
 313 static void fc_timeout_deleted_rport(struct work_struct *work);
 314 static void fc_timeout_fail_rport_io(struct work_struct *work);
 315 static void fc_scsi_scan_rport(struct work_struct *work);
 316
 317 /*
 318  * Attribute counts pre object type...
 319  * Increase these values if you add attributes
 320  */
 321 #define FC_STARGET_NUM_ATTRS    3
 322 #define FC_RPORT_NUM_ATTRS      10
 323 #define FC_VPORT_NUM_ATTRS      9
 324 #define FC_HOST_NUM_ATTRS       29
 325
 326 struct fc_internal {
 327         struct scsi_transport_template t;
 328         struct fc_function_template *f;
 329
 330         /*
 331          * For attributes : each object has :
 332          *   An array of the actual attributes structures
 333          *   An array of null-terminated pointers to the attribute
 334          *     structures - used for mid-layer interaction.
 335          *
 336          * The attribute containers for the starget and host are are
 337          * part of the midlayer. As the remote port is specific to the
 338          * fc transport, we must provide the attribute container.
 339          */
 340         struct device_attribute private_starget_attrs[
 341                                                         FC_STARGET_NUM_ATTRS];
 342         struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
 343
 344         struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
 345         struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
 346
 347         struct transport_container rport_attr_cont;
 348         struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
 349         struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
 350
 351         struct transport_container vport_attr_cont;
 352         struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
 353         struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
 354 };
 355
 356 #define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
 357
 358 static int fc_target_setup(struct transport_container *tc, struct device *dev,
 359                            struct device *cdev)
 360 {
 361         struct scsi_target *starget = to_scsi_target(dev);
 362         struct fc_rport *rport = starget_to_rport(starget);
 363
 364         /*
 365          * if parent is remote port, use values from remote port.
 366          * Otherwise, this host uses the fc_transport, but not the
 367          * remote port interface. As such, initialize to known non-values.
 368          */
 369         if (rport) {
 370                 fc_starget_node_name(starget) = rport->node_name;
 371                 fc_starget_port_name(starget) = rport->port_name;
 372                 fc_starget_port_id(starget) = rport->port_id;
 373         } else {
 374                 fc_starget_node_name(starget) = -1;
 375                 fc_starget_port_name(starget) = -1;
 376                 fc_starget_port_id(starget) = -1;
 377         }
 378
 379         return 0;
 380 }
 381
 382 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
 383                                "fc_transport",
 384                                fc_target_setup,
 385                                NULL,
 386                                NULL);
 387
 388 static int fc_host_setup(struct transport_container *tc, struct device *dev,
 389                          struct device *cdev)
 390 {
 391         struct Scsi_Host *shost = dev_to_shost(dev);
 392         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 393
 394         /*
 395          * Set default values easily detected by the midlayer as
 396          * failure cases.  The scsi lldd is responsible for initializing
 397          * all transport attributes to valid values per host.
 398          */
 399         fc_host->node_name = -1;
 400         fc_host->port_name = -1;
 401         fc_host->permanent_port_name = -1;
 402         fc_host->supported_classes = FC_COS_UNSPECIFIED;
 403         memset(fc_host->supported_fc4s, 0,
 404                 sizeof(fc_host->supported_fc4s));
 405         fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
 406         fc_host->maxframe_size = -1;
 407         fc_host->max_npiv_vports = 0;
 408         memset(fc_host->serial_number, 0,
 409                 sizeof(fc_host->serial_number));
 410         memset(fc_host->manufacturer, 0,
 411                 sizeof(fc_host->manufacturer));
 412         memset(fc_host->model, 0,
 413                 sizeof(fc_host->model));
 414         memset(fc_host->model_description, 0,
 415                 sizeof(fc_host->model_description));
 416         memset(fc_host->hardware_version, 0,
 417                 sizeof(fc_host->hardware_version));
 418         memset(fc_host->driver_version, 0,
 419                 sizeof(fc_host->driver_version));
 420         memset(fc_host->firmware_version, 0,
 421                 sizeof(fc_host->firmware_version));
 422         memset(fc_host->optionrom_version, 0,
 423                 sizeof(fc_host->optionrom_version));
 424
 425         fc_host->port_id = -1;
 426         fc_host->port_type = FC_PORTTYPE_UNKNOWN;
 427         fc_host->port_state = FC_PORTSTATE_UNKNOWN;
 428         memset(fc_host->active_fc4s, 0,
 429                 sizeof(fc_host->active_fc4s));
 430         fc_host->speed = FC_PORTSPEED_UNKNOWN;
 431         fc_host->fabric_name = -1;
 432         memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
 433         memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
 434
 435         fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
 436
 437         INIT_LIST_HEAD(&fc_host->rports);
 438         INIT_LIST_HEAD(&fc_host->rport_bindings);
 439         INIT_LIST_HEAD(&fc_host->vports);
 440         fc_host->next_rport_number = 0;
 441         fc_host->next_target_id = 0;
 442         fc_host->next_vport_number = 0;
 443         fc_host->npiv_vports_inuse = 0;
 444
 445         snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
 446                  "fc_wq_%d", shost->host_no);
 447         fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
 448         if (!fc_host->work_q)
 449                 return -ENOMEM;
 450
 451         fc_host->dev_loss_tmo = fc_dev_loss_tmo;
 452         snprintf(fc_host->devloss_work_q_name,
 453                  sizeof(fc_host->devloss_work_q_name),
 454                  "fc_dl_%d", shost->host_no);
 455         fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
 456                                         fc_host->devloss_work_q_name);
 457         if (!fc_host->devloss_work_q) {
 458                 destroy_workqueue(fc_host->work_q);
 459                 fc_host->work_q = NULL;
 460                 return -ENOMEM;
 461         }
 462
 463         fc_bsg_hostadd(shost, fc_host);
 464         /* ignore any bsg add error - we just can't do sgio */
 465
 466         return 0;
 467 }
 468
 469 static int fc_host_remove(struct transport_container *tc, struct device *dev,
 470                          struct device *cdev)
 471 {
 472         struct Scsi_Host *shost = dev_to_shost(dev);
 473         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
 474
 475         fc_bsg_remove(fc_host->rqst_q);
 476         return 0;
 477 }
 478
 479 static DECLARE_TRANSPORT_CLASS(fc_host_class,
 480                                "fc_host",
 481                                fc_host_setup,
 482                                fc_host_remove,
 483                                NULL);
 484
 485 /*
 486  * Setup and Remove actions for remote ports are handled
 487  * in the service functions below.
 488  */
 489 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
 490                                "fc_remote_ports",
 491                                NULL,
 492                                NULL,
 493                                NULL);
 494
 495 /*
 496  * Setup and Remove actions for virtual ports are handled
 497  * in the service functions below.
 498  */
 499 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
 500                                "fc_vports",
 501                                NULL,
 502                                NULL,
 503                                NULL);
 504
 505 /*
 506  * Netlink Infrastructure
 507  */
 508
 509 static atomic_t fc_event_seq;
 510
 511 /**
 512  * fc_get_event_number - Obtain the next sequential FC event number
 513  *
 514  * Notes:
 515  *   We could have inlined this, but it would have required fc_event_seq to
 516  *   be exposed. For now, live with the subroutine call.
 517  *   Atomic used to avoid lock/unlock...
 518  */
 519 u32
 520 fc_get_event_number(void)
 521 {
 522         return atomic_add_return(1, &fc_event_seq);
 523 }
 524 EXPORT_SYMBOL(fc_get_event_number);
 525
 526
 527 /**
 528  * fc_host_post_event - called to post an even on an fc_host.
 529  * @shost:              host the event occurred on
 530  * @event_number:       fc event number obtained from get_fc_event_number()
 531  * @event_code:         fc_host event being posted
 532  * @event_data:         32bits of data for the event being posted
 533  *
 534  * Notes:
 535  *      This routine assumes no locks are held on entry.
 536  */
 537 void
 538 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
 539                 enum fc_host_event_code event_code, u32 event_data)
 540 {
 541         struct sk_buff *skb;
 542         struct nlmsghdr *nlh;
 543         struct fc_nl_event *event;
 544         const char *name;
 545         u32 len;
 546         int err;
 547
 548         if (!scsi_nl_sock) {
 549                 err = -ENOENT;
 550                 goto send_fail;
 551         }
 552
 553         len = FC_NL_MSGALIGN(sizeof(*event));
 554
 555         skb = nlmsg_new(len, GFP_KERNEL);
 556         if (!skb) {
 557                 err = -ENOBUFS;
 558                 goto send_fail;
 559         }
 560
 561         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 562         if (!nlh) {
 563                 err = -ENOBUFS;
 564                 goto send_fail_skb;
 565         }
 566         event = nlmsg_data(nlh);
 567
 568         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 569                                 FC_NL_ASYNC_EVENT, len);
 570         event->seconds = get_seconds();
 571         event->vendor_id = 0;
 572         event->host_no = shost->host_no;
 573         event->event_datalen = sizeof(u32);     /* bytes */
 574         event->event_num = event_number;
 575         event->event_code = event_code;
 576         event->event_data = event_data;
 577
 578         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 579                         GFP_KERNEL);
 580         return;
 581
 582 send_fail_skb:
 583         kfree_skb(skb);
 584 send_fail:
 585         name = get_fc_host_event_code_name(event_code);
 586         printk(KERN_WARNING
 587                 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
 588                 __func__, shost->host_no,
 589                 (name) ? name : "<unknown>", event_data, err);
 590         return;
 591 }
 592 EXPORT_SYMBOL(fc_host_post_event);
 593
 594
 595 /**
 596  * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
 597  * @shost:              host the event occurred on
 598  * @event_number:       fc event number obtained from get_fc_event_number()
 599  * @data_len:           amount, in bytes, of vendor unique data
 600  * @data_buf:           pointer to vendor unique data
 601  * @vendor_id:          Vendor id
 602  *
 603  * Notes:
 604  *      This routine assumes no locks are held on entry.
 605  */
 606 void
 607 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
 608                 u32 data_len, char * data_buf, u64 vendor_id)
 609 {
 610         struct sk_buff *skb;
 611         struct nlmsghdr *nlh;
 612         struct fc_nl_event *event;
 613         u32 len;
 614         int err;
 615
 616         if (!scsi_nl_sock) {
 617                 err = -ENOENT;
 618                 goto send_vendor_fail;
 619         }
 620
 621         len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
 622
 623         skb = nlmsg_new(len, GFP_KERNEL);
 624         if (!skb) {
 625                 err = -ENOBUFS;
 626                 goto send_vendor_fail;
 627         }
 628
 629         nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
 630         if (!nlh) {
 631                 err = -ENOBUFS;
 632                 goto send_vendor_fail_skb;
 633         }
 634         event = nlmsg_data(nlh);
 635
 636         INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
 637                                 FC_NL_ASYNC_EVENT, len);
 638         event->seconds = get_seconds();
 639         event->vendor_id = vendor_id;
 640         event->host_no = shost->host_no;
 641         event->event_datalen = data_len;        /* bytes */
 642         event->event_num = event_number;
 643         event->event_code = FCH_EVT_VENDOR_UNIQUE;
 644         memcpy(&event->event_data, data_buf, data_len);
 645
 646         nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
 647                         GFP_KERNEL);
 648         return;
 649
 650 send_vendor_fail_skb:
 651         kfree_skb(skb);
 652 send_vendor_fail:
 653         printk(KERN_WARNING
 654                 "%s: Dropped Event : host %d vendor_unique - err %d\n",
 655                 __func__, shost->host_no, err);
 656         return;
 657 }
 658 EXPORT_SYMBOL(fc_host_post_vendor_event);
 659
 660
 661
 662 static __init int fc_transport_init(void)
 663 {
 664         int error;
 665
 666         atomic_set(&fc_event_seq, 0);
 667
 668         error = transport_class_register(&fc_host_class);
 669         if (error)
 670                 return error;
 671         error = transport_class_register(&fc_vport_class);
 672         if (error)
 673                 goto unreg_host_class;
 674         error = transport_class_register(&fc_rport_class);
 675         if (error)
 676                 goto unreg_vport_class;
 677         error = transport_class_register(&fc_transport_class);
 678         if (error)
 679                 goto unreg_rport_class;
 680         return 0;
 681
 682 unreg_rport_class:
 683         transport_class_unregister(&fc_rport_class);
 684 unreg_vport_class:
 685         transport_class_unregister(&fc_vport_class);
 686 unreg_host_class:
 687         transport_class_unregister(&fc_host_class);
 688         return error;
 689 }
 690
 691 static void __exit fc_transport_exit(void)
 692 {
 693         transport_class_unregister(&fc_transport_class);
 694         transport_class_unregister(&fc_rport_class);
 695         transport_class_unregister(&fc_host_class);
 696         transport_class_unregister(&fc_vport_class);
 697 }
 698
 699 /*
 700  * FC Remote Port Attribute Management
 701  */
 702
 703 #define fc_rport_show_function(field, format_string, sz, cast)          \
 704 static ssize_t                                                          \
 705 show_fc_rport_##field (struct device *dev,                              \
 706                        struct device_attribute *attr, char *buf)        \
 707 {                                                                       \
 708         struct fc_rport *rport = transport_class_to_rport(dev);         \
 709         struct Scsi_Host *shost = rport_to_shost(rport);                \
 710         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 711         if ((i->f->get_rport_##field) &&                                \
 712             !((rport->port_state == FC_PORTSTATE_BLOCKED) ||            \
 713               (rport->port_state == FC_PORTSTATE_DELETED) ||            \
 714               (rport->port_state == FC_PORTSTATE_NOTPRESENT)))          \
 715                 i->f->get_rport_##field(rport);                         \
 716         return snprintf(buf, sz, format_string, cast rport->field);     \
 717 }
 718
 719 #define fc_rport_store_function(field)                                  \
 720 static ssize_t                                                          \
 721 store_fc_rport_##field(struct device *dev,                              \
 722                        struct device_attribute *attr,                   \
 723                        const char *buf, size_t count)                   \
 724 {                                                                       \
 725         int val;                                                        \
 726         struct fc_rport *rport = transport_class_to_rport(dev);         \
 727         struct Scsi_Host *shost = rport_to_shost(rport);                \
 728         struct fc_internal *i = to_fc_internal(shost->transportt);      \
 729         char *cp;                                                       \
 730         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||              \
 731             (rport->port_state == FC_PORTSTATE_DELETED) ||              \
 732             (rport->port_state == FC_PORTSTATE_NOTPRESENT))             \
 733                 return -EBUSY;                                          \
 734         val = simple_strtoul(buf, &cp, 0);                              \
 735         if (*cp && (*cp != '\n'))                                       \
 736                 return -EINVAL;                                         \
 737         i->f->set_rport_##field(rport, val);                            \
 738         return count;                                                   \
 739 }
 740
 741 #define fc_rport_rd_attr(field, format_string, sz)                      \
 742         fc_rport_show_function(field, format_string, sz, )              \
 743 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 744                          show_fc_rport_##field, NULL)
 745
 746 #define fc_rport_rd_attr_cast(field, format_string, sz, cast)           \
 747         fc_rport_show_function(field, format_string, sz, (cast))        \
 748 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 749                           show_fc_rport_##field, NULL)
 750
 751 #define fc_rport_rw_attr(field, format_string, sz)                      \
 752         fc_rport_show_function(field, format_string, sz, )              \
 753         fc_rport_store_function(field)                                  \
 754 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,          \
 755                         show_fc_rport_##field,                          \
 756                         store_fc_rport_##field)
 757
 758
 759 #define fc_private_rport_show_function(field, format_string, sz, cast)  \
 760 static ssize_t                                                          \
 761 show_fc_rport_##field (struct device *dev,                              \
 762                        struct device_attribute *attr, char *buf)        \
 763 {                                                                       \
 764         struct fc_rport *rport = transport_class_to_rport(dev);         \
 765         return snprintf(buf, sz, format_string, cast rport->field);     \
 766 }
 767
 768 #define fc_private_rport_rd_attr(field, format_string, sz)              \
 769         fc_private_rport_show_function(field, format_string, sz, )      \
 770 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 771                          show_fc_rport_##field, NULL)
 772
 773 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)   \
 774         fc_private_rport_show_function(field, format_string, sz, (cast)) \
 775 static FC_DEVICE_ATTR(rport, field, S_IRUGO,                    \
 776                           show_fc_rport_##field, NULL)
 777
 778
 779 #define fc_private_rport_rd_enum_attr(title, maxlen)                    \
 780 static ssize_t                                                          \
 781 show_fc_rport_##title (struct device *dev,                              \
 782                        struct device_attribute *attr, char *buf)        \
 783 {                                                                       \
 784         struct fc_rport *rport = transport_class_to_rport(dev);         \
 785         const char *name;                                               \
 786         name = get_fc_##title##_name(rport->title);                     \
 787         if (!name)                                                      \
 788                 return -EINVAL;                                         \
 789         return snprintf(buf, maxlen, "%s\n", name);                     \
 790 }                                                                       \
 791 static FC_DEVICE_ATTR(rport, title, S_IRUGO,                    \
 792                         show_fc_rport_##title, NULL)
 793
 794
 795 #define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
 796         i->private_rport_attrs[count] = device_attr_rport_##field; \
 797         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 798         i->private_rport_attrs[count].store = NULL;                     \
 799         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 800         if (i->f->show_rport_##field)                                   \
 801                 count++
 802
 803 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)                         \
 804         i->private_rport_attrs[count] = device_attr_rport_##field; \
 805         i->private_rport_attrs[count].attr.mode = S_IRUGO;              \
 806         i->private_rport_attrs[count].store = NULL;                     \
 807         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 808         count++
 809
 810 #define SETUP_RPORT_ATTRIBUTE_RW(field)                                 \
 811         i->private_rport_attrs[count] = device_attr_rport_##field; \
 812         if (!i->f->set_rport_##field) {                                 \
 813                 i->private_rport_attrs[count].attr.mode = S_IRUGO;      \
 814                 i->private_rport_attrs[count].store = NULL;             \
 815         }                                                               \
 816         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 817         if (i->f->show_rport_##field)                                   \
 818                 count++
 819
 820 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)                         \
 821 {                                                                       \
 822         i->private_rport_attrs[count] = device_attr_rport_##field; \
 823         i->rport_attrs[count] = &i->private_rport_attrs[count];         \
 824         count++;                                                        \
 825 }
 826
 827
 828 /* The FC Transport Remote Port Attributes: */
 829
 830 /* Fixed Remote Port Attributes */
 831
 832 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
 833
 834 static ssize_t
 835 show_fc_rport_supported_classes (struct device *dev,
 836                                  struct device_attribute *attr, char *buf)
 837 {
 838         struct fc_rport *rport = transport_class_to_rport(dev);
 839         if (rport->supported_classes == FC_COS_UNSPECIFIED)
 840                 return snprintf(buf, 20, "unspecified\n");
 841         return get_fc_cos_names(rport->supported_classes, buf);
 842 }
 843 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
 844                 show_fc_rport_supported_classes, NULL);
 845
 846 /* Dynamic Remote Port Attributes */
 847
 848 /*
 849  * dev_loss_tmo attribute
 850  */
 851 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
 852 {
 853         char *cp;
 854
 855         *val = simple_strtoul(buf, &cp, 0);
 856         if (*cp && (*cp != '\n'))
 857                 return -EINVAL;
 858         /*
 859          * Check for overflow; dev_loss_tmo is u32
 860          */
 861         if (*val > UINT_MAX)
 862                 return -EINVAL;
 863
 864         return 0;
 865 }
 866
 867 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
 868                                      unsigned long val)
 869 {
 870         struct Scsi_Host *shost = rport_to_shost(rport);
 871         struct fc_internal *i = to_fc_internal(shost->transportt);
 872
 873         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 874             (rport->port_state == FC_PORTSTATE_DELETED) ||
 875             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 876                 return -EBUSY;
 877         /*
 878          * Check for overflow; dev_loss_tmo is u32
 879          */
 880         if (val > UINT_MAX)
 881                 return -EINVAL;
 882
 883         /*
 884          * If fast_io_fail is off we have to cap
 885          * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
 886          */
 887         if (rport->fast_io_fail_tmo == -1 &&
 888             val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
 889                 return -EINVAL;
 890
 891         i->f->set_rport_dev_loss_tmo(rport, val);
 892         return 0;
 893 }
 894
 895 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
 896 static ssize_t
 897 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
 898                             const char *buf, size_t count)
 899 {
 900         struct fc_rport *rport = transport_class_to_rport(dev);
 901         unsigned long val;
 902         int rc;
 903
 904         rc = fc_str_to_dev_loss(buf, &val);
 905         if (rc)
 906                 return rc;
 907
 908         rc = fc_rport_set_dev_loss_tmo(rport, val);
 909         if (rc)
 910                 return rc;
 911         return count;
 912 }
 913 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
 914                 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
 915
 916
 917 /* Private Remote Port Attributes */
 918
 919 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
 920 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
 921 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
 922
 923 static ssize_t
 924 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
 925                      char *buf)
 926 {
 927         struct fc_rport *rport = transport_class_to_rport(dev);
 928
 929         /* identify any roles that are port_id specific */
 930         if ((rport->port_id != -1) &&
 931             (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
 932                                         FC_WELLKNOWN_PORTID_MASK) {
 933                 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
 934                 case FC_FPORT_PORTID:
 935                         return snprintf(buf, 30, "Fabric Port\n");
 936                 case FC_FABCTLR_PORTID:
 937                         return snprintf(buf, 30, "Fabric Controller\n");
 938                 case FC_DIRSRVR_PORTID:
 939                         return snprintf(buf, 30, "Directory Server\n");
 940                 case FC_TIMESRVR_PORTID:
 941                         return snprintf(buf, 30, "Time Server\n");
 942                 case FC_MGMTSRVR_PORTID:
 943                         return snprintf(buf, 30, "Management Server\n");
 944                 default:
 945                         return snprintf(buf, 30, "Unknown Fabric Entity\n");
 946                 }
 947         } else {
 948                 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
 949                         return snprintf(buf, 20, "unknown\n");
 950                 return get_fc_port_roles_names(rport->roles, buf);
 951         }
 952 }
 953 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
 954                 show_fc_rport_roles, NULL);
 955
 956 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
 957 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
 958
 959 /*
 960  * fast_io_fail_tmo attribute
 961  */
 962 static ssize_t
 963 show_fc_rport_fast_io_fail_tmo (struct device *dev,
 964                                 struct device_attribute *attr, char *buf)
 965 {
 966         struct fc_rport *rport = transport_class_to_rport(dev);
 967
 968         if (rport->fast_io_fail_tmo == -1)
 969                 return snprintf(buf, 5, "off\n");
 970         return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
 971 }
 972
 973 static ssize_t
 974 store_fc_rport_fast_io_fail_tmo(struct device *dev,
 975                                 struct device_attribute *attr, const char *buf,
 976                                 size_t count)
 977 {
 978         int val;
 979         char *cp;
 980         struct fc_rport *rport = transport_class_to_rport(dev);
 981
 982         if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
 983             (rport->port_state == FC_PORTSTATE_DELETED) ||
 984             (rport->port_state == FC_PORTSTATE_NOTPRESENT))
 985                 return -EBUSY;
 986         if (strncmp(buf, "off", 3) == 0)
 987                 rport->fast_io_fail_tmo = -1;
 988         else {
 989                 val = simple_strtoul(buf, &cp, 0);
 990                 if ((*cp && (*cp != '\n')) || (val < 0))
 991                         return -EINVAL;
 992                 /*
 993                  * Cap fast_io_fail by dev_loss_tmo or
 994                  * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 995                  */
 996                 if ((val >= rport->dev_loss_tmo) ||
 997                     (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
 998                         return -EINVAL;
 999
1000                 rport->fast_io_fail_tmo = val;
1001         }
1002         return count;
1003 }
1004 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1005         show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1006
1007
1008 /*
1009  * FC SCSI Target Attribute Management
1010  */
1011
1012 /*
1013  * Note: in the target show function we recognize when the remote
1014  *  port is in the hierarchy and do not allow the driver to get
1015  *  involved in sysfs functions. The driver only gets involved if
1016  *  it's the "old" style that doesn't use rports.
1017  */
1018 #define fc_starget_show_function(field, format_string, sz, cast)        \
1019 static ssize_t                                                          \
1020 show_fc_starget_##field (struct device *dev,                            \
1021                          struct device_attribute *attr, char *buf)      \
1022 {                                                                       \
1023         struct scsi_target *starget = transport_class_to_starget(dev);  \
1024         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);    \
1025         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1026         struct fc_rport *rport = starget_to_rport(starget);             \
1027         if (rport)                                                      \
1028                 fc_starget_##field(starget) = rport->field;             \
1029         else if (i->f->get_starget_##field)                             \
1030                 i->f->get_starget_##field(starget);                     \
1031         return snprintf(buf, sz, format_string,                         \
1032                 cast fc_starget_##field(starget));                      \
1033 }
1034
1035 #define fc_starget_rd_attr(field, format_string, sz)                    \
1036         fc_starget_show_function(field, format_string, sz, )            \
1037 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1038                          show_fc_starget_##field, NULL)
1039
1040 #define fc_starget_rd_attr_cast(field, format_string, sz, cast)         \
1041         fc_starget_show_function(field, format_string, sz, (cast))      \
1042 static FC_DEVICE_ATTR(starget, field, S_IRUGO,                  \
1043                           show_fc_starget_##field, NULL)
1044
1045 #define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
1046         i->private_starget_attrs[count] = device_attr_starget_##field; \
1047         i->private_starget_attrs[count].attr.mode = S_IRUGO;            \
1048         i->private_starget_attrs[count].store = NULL;                   \
1049         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1050         if (i->f->show_starget_##field)                                 \
1051                 count++
1052
1053 #define SETUP_STARGET_ATTRIBUTE_RW(field)                               \
1054         i->private_starget_attrs[count] = device_attr_starget_##field; \
1055         if (!i->f->set_starget_##field) {                               \
1056                 i->private_starget_attrs[count].attr.mode = S_IRUGO;    \
1057                 i->private_starget_attrs[count].store = NULL;           \
1058         }                                                               \
1059         i->starget_attrs[count] = &i->private_starget_attrs[count];     \
1060         if (i->f->show_starget_##field)                                 \
1061                 count++
1062
1063 /* The FC Transport SCSI Target Attributes: */
1064 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1065 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1066 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1067
1068
1069 /*
1070  * FC Virtual Port Attribute Management
1071  */
1072
1073 #define fc_vport_show_function(field, format_string, sz, cast)          \
1074 static ssize_t                                                          \
1075 show_fc_vport_##field (struct device *dev,                              \
1076                        struct device_attribute *attr, char *buf)        \
1077 {                                                                       \
1078         struct fc_vport *vport = transport_class_to_vport(dev);         \
1079         struct Scsi_Host *shost = vport_to_shost(vport);                \
1080         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1081         if ((i->f->get_vport_##field) &&                                \
1082             !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))       \
1083                 i->f->get_vport_##field(vport);                         \
1084         return snprintf(buf, sz, format_string, cast vport->field);     \
1085 }
1086
1087 #define fc_vport_store_function(field)                                  \
1088 static ssize_t                                                          \
1089 store_fc_vport_##field(struct device *dev,                              \
1090                        struct device_attribute *attr,                   \
1091                        const char *buf, size_t count)                   \
1092 {                                                                       \
1093         int val;                                                        \
1094         struct fc_vport *vport = transport_class_to_vport(dev);         \
1095         struct Scsi_Host *shost = vport_to_shost(vport);                \
1096         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1097         char *cp;                                                       \
1098         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))  \
1099                 return -EBUSY;                                          \
1100         val = simple_strtoul(buf, &cp, 0);                              \
1101         if (*cp && (*cp != '\n'))                                       \
1102                 return -EINVAL;                                         \
1103         i->f->set_vport_##field(vport, val);                            \
1104         return count;                                                   \
1105 }
1106
1107 #define fc_vport_store_str_function(field, slen)                        \
1108 static ssize_t                                                          \
1109 store_fc_vport_##field(struct device *dev,                              \
1110                        struct device_attribute *attr,                   \
1111                        const char *buf, size_t count)                   \
1112 {                                                                       \
1113         struct fc_vport *vport = transport_class_to_vport(dev);         \
1114         struct Scsi_Host *shost = vport_to_shost(vport);                \
1115         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1116         unsigned int cnt=count;                                         \
1117                                                                         \
1118         /* count may include a LF at end of string */                   \
1119         if (buf[cnt-1] == '\n')                                         \
1120                 cnt--;                                                  \
1121         if (cnt > ((slen) - 1))                                         \
1122                 return -EINVAL;                                         \
1123         memcpy(vport->field, buf, cnt);                                 \
1124         i->f->set_vport_##field(vport);                                 \
1125         return count;                                                   \
1126 }
1127
1128 #define fc_vport_rd_attr(field, format_string, sz)                      \
1129         fc_vport_show_function(field, format_string, sz, )              \
1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1131                          show_fc_vport_##field, NULL)
1132
1133 #define fc_vport_rd_attr_cast(field, format_string, sz, cast)           \
1134         fc_vport_show_function(field, format_string, sz, (cast))        \
1135 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1136                           show_fc_vport_##field, NULL)
1137
1138 #define fc_vport_rw_attr(field, format_string, sz)                      \
1139         fc_vport_show_function(field, format_string, sz, )              \
1140         fc_vport_store_function(field)                                  \
1141 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1142                         show_fc_vport_##field,                          \
1143                         store_fc_vport_##field)
1144
1145 #define fc_private_vport_show_function(field, format_string, sz, cast)  \
1146 static ssize_t                                                          \
1147 show_fc_vport_##field (struct device *dev,                              \
1148                        struct device_attribute *attr, char *buf)        \
1149 {                                                                       \
1150         struct fc_vport *vport = transport_class_to_vport(dev);         \
1151         return snprintf(buf, sz, format_string, cast vport->field);     \
1152 }
1153
1154 #define fc_private_vport_store_u32_function(field)                      \
1155 static ssize_t                                                          \
1156 store_fc_vport_##field(struct device *dev,                              \
1157                        struct device_attribute *attr,                   \
1158                        const char *buf, size_t count)                   \
1159 {                                                                       \
1160         u32 val;                                                        \
1161         struct fc_vport *vport = transport_class_to_vport(dev);         \
1162         char *cp;                                                       \
1163         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))          \
1164                 return -EBUSY;                                          \
1165         val = simple_strtoul(buf, &cp, 0);                              \
1166         if (*cp && (*cp != '\n'))                                       \
1167                 return -EINVAL;                                         \
1168         vport->field = val;                                             \
1169         return count;                                                   \
1170 }
1171
1172
1173 #define fc_private_vport_rd_attr(field, format_string, sz)              \
1174         fc_private_vport_show_function(field, format_string, sz, )      \
1175 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1176                          show_fc_vport_##field, NULL)
1177
1178 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)   \
1179         fc_private_vport_show_function(field, format_string, sz, (cast)) \
1180 static FC_DEVICE_ATTR(vport, field, S_IRUGO,                    \
1181                           show_fc_vport_##field, NULL)
1182
1183 #define fc_private_vport_rw_u32_attr(field, format_string, sz)          \
1184         fc_private_vport_show_function(field, format_string, sz, )      \
1185         fc_private_vport_store_u32_function(field)                      \
1186 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,          \
1187                         show_fc_vport_##field,                          \
1188                         store_fc_vport_##field)
1189
1190
1191 #define fc_private_vport_rd_enum_attr(title, maxlen)                    \
1192 static ssize_t                                                          \
1193 show_fc_vport_##title (struct device *dev,                              \
1194                        struct device_attribute *attr,                   \
1195                        char *buf)                                       \
1196 {                                                                       \
1197         struct fc_vport *vport = transport_class_to_vport(dev);         \
1198         const char *name;                                               \
1199         name = get_fc_##title##_name(vport->title);                     \
1200         if (!name)                                                      \
1201                 return -EINVAL;                                         \
1202         return snprintf(buf, maxlen, "%s\n", name);                     \
1203 }                                                                       \
1204 static FC_DEVICE_ATTR(vport, title, S_IRUGO,                    \
1205                         show_fc_vport_##title, NULL)
1206
1207
1208 #define SETUP_VPORT_ATTRIBUTE_RD(field)                                 \
1209         i->private_vport_attrs[count] = device_attr_vport_##field; \
1210         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1211         i->private_vport_attrs[count].store = NULL;                     \
1212         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1213         if (i->f->get_##field)                                          \
1214                 count++
1215         /* NOTE: Above MACRO differs: checks function not show bit */
1216
1217 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)                         \
1218         i->private_vport_attrs[count] = device_attr_vport_##field; \
1219         i->private_vport_attrs[count].attr.mode = S_IRUGO;              \
1220         i->private_vport_attrs[count].store = NULL;                     \
1221         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1222         count++
1223
1224 #define SETUP_VPORT_ATTRIBUTE_WR(field)                                 \
1225         i->private_vport_attrs[count] = device_attr_vport_##field; \
1226         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1227         if (i->f->field)                                                \
1228                 count++
1229         /* NOTE: Above MACRO differs: checks function */
1230
1231 #define SETUP_VPORT_ATTRIBUTE_RW(field)                                 \
1232         i->private_vport_attrs[count] = device_attr_vport_##field; \
1233         if (!i->f->set_vport_##field) {                                 \
1234                 i->private_vport_attrs[count].attr.mode = S_IRUGO;      \
1235                 i->private_vport_attrs[count].store = NULL;             \
1236         }                                                               \
1237         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1238         count++
1239         /* NOTE: Above MACRO differs: does not check show bit */
1240
1241 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)                         \
1242 {                                                                       \
1243         i->private_vport_attrs[count] = device_attr_vport_##field; \
1244         i->vport_attrs[count] = &i->private_vport_attrs[count];         \
1245         count++;                                                        \
1246 }
1247
1248
1249 /* The FC Transport Virtual Port Attributes: */
1250
1251 /* Fixed Virtual Port Attributes */
1252
1253 /* Dynamic Virtual Port Attributes */
1254
1255 /* Private Virtual Port Attributes */
1256
1257 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1258 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1259 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1260 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1261
1262 static ssize_t
1263 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1264                      char *buf)
1265 {
1266         struct fc_vport *vport = transport_class_to_vport(dev);
1267
1268         if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1269                 return snprintf(buf, 20, "unknown\n");
1270         return get_fc_port_roles_names(vport->roles, buf);
1271 }
1272 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1273
1274 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1275
1276 fc_private_vport_show_function(symbolic_name, "%s\n",
1277                 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1278 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1279 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1280                 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1281
1282 static ssize_t
1283 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1284                       const char *buf, size_t count)
1285 {
1286         struct fc_vport *vport = transport_class_to_vport(dev);
1287         struct Scsi_Host *shost = vport_to_shost(vport);
1288         unsigned long flags;
1289
1290         spin_lock_irqsave(shost->host_lock, flags);
1291         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
1292                 spin_unlock_irqrestore(shost->host_lock, flags);
1293                 return -EBUSY;
1294         }
1295         vport->flags |= FC_VPORT_DELETING;
1296         spin_unlock_irqrestore(shost->host_lock, flags);
1297
1298         fc_queue_work(shost, &vport->vport_delete_work);
1299         return count;
1300 }
1301 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1302                         NULL, store_fc_vport_delete);
1303
1304
1305 /*
1306  * Enable/Disable vport
1307  *  Write "1" to disable, write "0" to enable
1308  */
1309 static ssize_t
1310 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1311                        const char *buf,
1312                            size_t count)
1313 {
1314         struct fc_vport *vport = transport_class_to_vport(dev);
1315         struct Scsi_Host *shost = vport_to_shost(vport);
1316         struct fc_internal *i = to_fc_internal(shost->transportt);
1317         int stat;
1318
1319         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1320                 return -EBUSY;
1321
1322         if (*buf == '0') {
1323                 if (vport->vport_state != FC_VPORT_DISABLED)
1324                         return -EALREADY;
1325         } else if (*buf == '1') {
1326                 if (vport->vport_state == FC_VPORT_DISABLED)
1327                         return -EALREADY;
1328         } else
1329                 return -EINVAL;
1330
1331         stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1332         return stat ? stat : count;
1333 }
1334 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1335                         NULL, store_fc_vport_disable);
1336
1337
1338 /*
1339  * Host Attribute Management
1340  */
1341
1342 #define fc_host_show_function(field, format_string, sz, cast)           \
1343 static ssize_t                                                          \
1344 show_fc_host_##field (struct device *dev,                               \
1345                       struct device_attribute *attr, char *buf)         \
1346 {                                                                       \
1347         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1348         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1349         if (i->f->get_host_##field)                                     \
1350                 i->f->get_host_##field(shost);                          \
1351         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1352 }
1353
1354 #define fc_host_store_function(field)                                   \
1355 static ssize_t                                                          \
1356 store_fc_host_##field(struct device *dev,                               \
1357                       struct device_attribute *attr,                    \
1358                       const char *buf,  size_t count)                   \
1359 {                                                                       \
1360         int val;                                                        \
1361         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1362         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1363         char *cp;                                                       \
1364                                                                         \
1365         val = simple_strtoul(buf, &cp, 0);                              \
1366         if (*cp && (*cp != '\n'))                                       \
1367                 return -EINVAL;                                         \
1368         i->f->set_host_##field(shost, val);                             \
1369         return count;                                                   \
1370 }
1371
1372 #define fc_host_store_str_function(field, slen)                         \
1373 static ssize_t                                                          \
1374 store_fc_host_##field(struct device *dev,                               \
1375                       struct device_attribute *attr,                    \
1376                       const char *buf, size_t count)                    \
1377 {                                                                       \
1378         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1379         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1380         unsigned int cnt=count;                                         \
1381                                                                         \
1382         /* count may include a LF at end of string */                   \
1383         if (buf[cnt-1] == '\n')                                         \
1384                 cnt--;                                                  \
1385         if (cnt > ((slen) - 1))                                         \
1386                 return -EINVAL;                                         \
1387         memcpy(fc_host_##field(shost), buf, cnt);                       \
1388         i->f->set_host_##field(shost);                                  \
1389         return count;                                                   \
1390 }
1391
1392 #define fc_host_rd_attr(field, format_string, sz)                       \
1393         fc_host_show_function(field, format_string, sz, )               \
1394 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1395                          show_fc_host_##field, NULL)
1396
1397 #define fc_host_rd_attr_cast(field, format_string, sz, cast)            \
1398         fc_host_show_function(field, format_string, sz, (cast))         \
1399 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1400                           show_fc_host_##field, NULL)
1401
1402 #define fc_host_rw_attr(field, format_string, sz)                       \
1403         fc_host_show_function(field, format_string, sz, )               \
1404         fc_host_store_function(field)                                   \
1405 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,           \
1406                         show_fc_host_##field,                           \
1407                         store_fc_host_##field)
1408
1409 #define fc_host_rd_enum_attr(title, maxlen)                             \
1410 static ssize_t                                                          \
1411 show_fc_host_##title (struct device *dev,                               \
1412                       struct device_attribute *attr, char *buf)         \
1413 {                                                                       \
1414         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1415         struct fc_internal *i = to_fc_internal(shost->transportt);      \
1416         const char *name;                                               \
1417         if (i->f->get_host_##title)                                     \
1418                 i->f->get_host_##title(shost);                          \
1419         name = get_fc_##title##_name(fc_host_##title(shost));           \
1420         if (!name)                                                      \
1421                 return -EINVAL;                                         \
1422         return snprintf(buf, maxlen, "%s\n", name);                     \
1423 }                                                                       \
1424 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1425
1426 #define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
1427         i->private_host_attrs[count] = device_attr_host_##field;        \
1428         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1429         i->private_host_attrs[count].store = NULL;                      \
1430         i->host_attrs[count] = &i->private_host_attrs[count];           \
1431         if (i->f->show_host_##field)                                    \
1432                 count++
1433
1434 #define SETUP_HOST_ATTRIBUTE_RD_NS(field)                               \
1435         i->private_host_attrs[count] = device_attr_host_##field;        \
1436         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1437         i->private_host_attrs[count].store = NULL;                      \
1438         i->host_attrs[count] = &i->private_host_attrs[count];           \
1439         count++
1440
1441 #define SETUP_HOST_ATTRIBUTE_RW(field)                                  \
1442         i->private_host_attrs[count] = device_attr_host_##field;        \
1443         if (!i->f->set_host_##field) {                                  \
1444                 i->private_host_attrs[count].attr.mode = S_IRUGO;       \
1445                 i->private_host_attrs[count].store = NULL;              \
1446         }                                                               \
1447         i->host_attrs[count] = &i->private_host_attrs[count];           \
1448         if (i->f->show_host_##field)                                    \
1449                 count++
1450
1451
1452 #define fc_private_host_show_function(field, format_string, sz, cast)   \
1453 static ssize_t                                                          \
1454 show_fc_host_##field (struct device *dev,                               \
1455                       struct device_attribute *attr, char *buf)         \
1456 {                                                                       \
1457         struct Scsi_Host *shost = transport_class_to_shost(dev);        \
1458         return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1459 }
1460
1461 #define fc_private_host_rd_attr(field, format_string, sz)               \
1462         fc_private_host_show_function(field, format_string, sz, )       \
1463 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1464                          show_fc_host_##field, NULL)
1465
1466 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast)    \
1467         fc_private_host_show_function(field, format_string, sz, (cast)) \
1468 static FC_DEVICE_ATTR(host, field, S_IRUGO,                     \
1469                           show_fc_host_##field, NULL)
1470
1471 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
1472         i->private_host_attrs[count] = device_attr_host_##field;        \
1473         i->private_host_attrs[count].attr.mode = S_IRUGO;               \
1474         i->private_host_attrs[count].store = NULL;                      \
1475         i->host_attrs[count] = &i->private_host_attrs[count];           \
1476         count++
1477
1478 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)                  \
1479 {                                                                       \
1480         i->private_host_attrs[count] = device_attr_host_##field;        \
1481         i->host_attrs[count] = &i->private_host_attrs[count];           \
1482         count++;                                                        \
1483 }
1484
1485
1486 /* Fixed Host Attributes */
1487
1488 static ssize_t
1489 show_fc_host_supported_classes (struct device *dev,
1490                                 struct device_attribute *attr, char *buf)
1491 {
1492         struct Scsi_Host *shost = transport_class_to_shost(dev);
1493
1494         if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1495                 return snprintf(buf, 20, "unspecified\n");
1496
1497         return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1498 }
1499 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1500                 show_fc_host_supported_classes, NULL);
1501
1502 static ssize_t
1503 show_fc_host_supported_fc4s (struct device *dev,
1504                              struct device_attribute *attr, char *buf)
1505 {
1506         struct Scsi_Host *shost = transport_class_to_shost(dev);
1507         return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1508 }
1509 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1510                 show_fc_host_supported_fc4s, NULL);
1511
1512 static ssize_t
1513 show_fc_host_supported_speeds (struct device *dev,
1514                                struct device_attribute *attr, char *buf)
1515 {
1516         struct Scsi_Host *shost = transport_class_to_shost(dev);
1517
1518         if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1519                 return snprintf(buf, 20, "unknown\n");
1520
1521         return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1522 }
1523 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1524                 show_fc_host_supported_speeds, NULL);
1525
1526
1527 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1528 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1529 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1530                              unsigned long long);
1531 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1532 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1533 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1534 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1535 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1536 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1537 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1538 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1539 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1540 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1541
1542
1543 /* Dynamic Host Attributes */
1544
1545 static ssize_t
1546 show_fc_host_active_fc4s (struct device *dev,
1547                           struct device_attribute *attr, char *buf)
1548 {
1549         struct Scsi_Host *shost = transport_class_to_shost(dev);
1550         struct fc_internal *i = to_fc_internal(shost->transportt);
1551
1552         if (i->f->get_host_active_fc4s)
1553                 i->f->get_host_active_fc4s(shost);
1554
1555         return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1556 }
1557 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1558                 show_fc_host_active_fc4s, NULL);
1559
1560 static ssize_t
1561 show_fc_host_speed (struct device *dev,
1562                     struct device_attribute *attr, char *buf)
1563 {
1564         struct Scsi_Host *shost = transport_class_to_shost(dev);
1565         struct fc_internal *i = to_fc_internal(shost->transportt);
1566
1567         if (i->f->get_host_speed)
1568                 i->f->get_host_speed(shost);
1569
1570         if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1571                 return snprintf(buf, 20, "unknown\n");
1572
1573         return get_fc_port_speed_names(fc_host_speed(shost), buf);
1574 }
1575 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1576                 show_fc_host_speed, NULL);
1577
1578
1579 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1580 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1581 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1582 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1583 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1584
1585 fc_private_host_show_function(system_hostname, "%s\n",
1586                 FC_SYMBOLIC_NAME_SIZE + 1, )
1587 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1588 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1589                 show_fc_host_system_hostname, store_fc_host_system_hostname);
1590
1591
1592 /* Private Host Attributes */
1593
1594 static ssize_t
1595 show_fc_private_host_tgtid_bind_type(struct device *dev,
1596                                      struct device_attribute *attr, char *buf)
1597 {
1598         struct Scsi_Host *shost = transport_class_to_shost(dev);
1599         const char *name;
1600
1601         name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1602         if (!name)
1603                 return -EINVAL;
1604         return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1605 }
1606
1607 #define get_list_head_entry(pos, head, member)          \
1608         pos = list_entry((head)->next, typeof(*pos), member)
1609
1610 static ssize_t
1611 store_fc_private_host_tgtid_bind_type(struct device *dev,
1612         struct device_attribute *attr, const char *buf, size_t count)
1613 {
1614         struct Scsi_Host *shost = transport_class_to_shost(dev);
1615         struct fc_rport *rport;
1616         enum fc_tgtid_binding_type val;
1617         unsigned long flags;
1618
1619         if (get_fc_tgtid_bind_type_match(buf, &val))
1620                 return -EINVAL;
1621
1622         /* if changing bind type, purge all unused consistent bindings */
1623         if (val != fc_host_tgtid_bind_type(shost)) {
1624                 spin_lock_irqsave(shost->host_lock, flags);
1625                 while (!list_empty(&fc_host_rport_bindings(shost))) {
1626                         get_list_head_entry(rport,
1627                                 &fc_host_rport_bindings(shost), peers);
1628                         list_del(&rport->peers);
1629                         rport->port_state = FC_PORTSTATE_DELETED;
1630                         fc_queue_work(shost, &rport->rport_delete_work);
1631                 }
1632                 spin_unlock_irqrestore(shost->host_lock, flags);
1633         }
1634
1635         fc_host_tgtid_bind_type(shost) = val;
1636         return count;
1637 }
1638
1639 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1640                         show_fc_private_host_tgtid_bind_type,
1641                         store_fc_private_host_tgtid_bind_type);
1642
1643 static ssize_t
1644 store_fc_private_host_issue_lip(struct device *dev,
1645         struct device_attribute *attr, const char *buf, size_t count)
1646 {
1647         struct Scsi_Host *shost = transport_class_to_shost(dev);
1648         struct fc_internal *i = to_fc_internal(shost->transportt);
1649         int ret;
1650
1651         /* ignore any data value written to the attribute */
1652         if (i->f->issue_fc_host_lip) {
1653                 ret = i->f->issue_fc_host_lip(shost);
1654                 return ret ? ret: count;
1655         }
1656
1657         return -ENOENT;
1658 }
1659
1660 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1661                         store_fc_private_host_issue_lip);
1662
1663 static ssize_t
1664 store_fc_private_host_dev_loss_tmo(struct device *dev,
1665                                    struct device_attribute *attr,
1666                                    const char *buf, size_t count)
1667 {
1668         struct Scsi_Host *shost = transport_class_to_shost(dev);
1669         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1670         struct fc_rport *rport;
1671         unsigned long val, flags;
1672         int rc;
1673
1674         rc = fc_str_to_dev_loss(buf, &val);
1675         if (rc)
1676                 return rc;
1677
1678         fc_host_dev_loss_tmo(shost) = val;
1679         spin_lock_irqsave(shost->host_lock, flags);
1680         list_for_each_entry(rport, &fc_host->rports, peers)
1681                 fc_rport_set_dev_loss_tmo(rport, val);
1682         spin_unlock_irqrestore(shost->host_lock, flags);
1683         return count;
1684 }
1685
1686 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1687 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1688                       show_fc_host_dev_loss_tmo,
1689                       store_fc_private_host_dev_loss_tmo);
1690
1691 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1692
1693 /*
1694  * Host Statistics Management
1695  */
1696
1697 /* Show a given attribute in the statistics group */
1698 static ssize_t
1699 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1700 {
1701         struct Scsi_Host *shost = transport_class_to_shost(dev);
1702         struct fc_internal *i = to_fc_internal(shost->transportt);
1703         struct fc_host_statistics *stats;
1704         ssize_t ret = -ENOENT;
1705
1706         if (offset > sizeof(struct fc_host_statistics) ||
1707             offset % sizeof(u64) != 0)
1708                 WARN_ON(1);
1709
1710         if (i->f->get_fc_host_stats) {
1711                 stats = (i->f->get_fc_host_stats)(shost);
1712                 if (stats)
1713                         ret = snprintf(buf, 20, "0x%llx\n",
1714                               (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1715         }
1716         return ret;
1717 }
1718
1719
1720 /* generate a read-only statistics attribute */
1721 #define fc_host_statistic(name)                                         \
1722 static ssize_t show_fcstat_##name(struct device *cd,                    \
1723                                   struct device_attribute *attr,        \
1724                                   char *buf)                            \
1725 {                                                                       \
1726         return fc_stat_show(cd, buf,                                    \
1727                             offsetof(struct fc_host_statistics, name)); \
1728 }                                                                       \
1729 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1730
1731 fc_host_statistic(seconds_since_last_reset);
1732 fc_host_statistic(tx_frames);
1733 fc_host_statistic(tx_words);
1734 fc_host_statistic(rx_frames);
1735 fc_host_statistic(rx_words);
1736 fc_host_statistic(lip_count);
1737 fc_host_statistic(nos_count);
1738 fc_host_statistic(error_frames);
1739 fc_host_statistic(dumped_frames);
1740 fc_host_statistic(link_failure_count);
1741 fc_host_statistic(loss_of_sync_count);
1742 fc_host_statistic(loss_of_signal_count);
1743 fc_host_statistic(prim_seq_protocol_err_count);
1744 fc_host_statistic(invalid_tx_word_count);
1745 fc_host_statistic(invalid_crc_count);
1746 fc_host_statistic(fcp_input_requests);
1747 fc_host_statistic(fcp_output_requests);
1748 fc_host_statistic(fcp_control_requests);
1749 fc_host_statistic(fcp_input_megabytes);
1750 fc_host_statistic(fcp_output_megabytes);
1751 fc_host_statistic(fcp_packet_alloc_failures);
1752 fc_host_statistic(fcp_packet_aborts);
1753 fc_host_statistic(fcp_frame_alloc_failures);
1754 fc_host_statistic(fc_no_free_exch);
1755 fc_host_statistic(fc_no_free_exch_xid);
1756 fc_host_statistic(fc_xid_not_found);
1757 fc_host_statistic(fc_xid_busy);
1758 fc_host_statistic(fc_seq_not_found);
1759 fc_host_statistic(fc_non_bls_resp);
1760
1761 static ssize_t
1762 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1763                     const char *buf, size_t count)
1764 {
1765         struct Scsi_Host *shost = transport_class_to_shost(dev);
1766         struct fc_internal *i = to_fc_internal(shost->transportt);
1767
1768         /* ignore any data value written to the attribute */
1769         if (i->f->reset_fc_host_stats) {
1770                 i->f->reset_fc_host_stats(shost);
1771                 return count;
1772         }
1773
1774         return -ENOENT;
1775 }
1776 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1777                                 fc_reset_statistics);
1778
1779 static struct attribute *fc_statistics_attrs[] = {
1780         &device_attr_host_seconds_since_last_reset.attr,
1781         &device_attr_host_tx_frames.attr,
1782         &device_attr_host_tx_words.attr,
1783         &device_attr_host_rx_frames.attr,
1784         &device_attr_host_rx_words.attr,
1785         &device_attr_host_lip_count.attr,
1786         &device_attr_host_nos_count.attr,
1787         &device_attr_host_error_frames.attr,
1788         &device_attr_host_dumped_frames.attr,
1789         &device_attr_host_link_failure_count.attr,
1790         &device_attr_host_loss_of_sync_count.attr,
1791         &device_attr_host_loss_of_signal_count.attr,
1792         &device_attr_host_prim_seq_protocol_err_count.attr,
1793         &device_attr_host_invalid_tx_word_count.attr,
1794         &device_attr_host_invalid_crc_count.attr,
1795         &device_attr_host_fcp_input_requests.attr,
1796         &device_attr_host_fcp_output_requests.attr,
1797         &device_attr_host_fcp_control_requests.attr,
1798         &device_attr_host_fcp_input_megabytes.attr,
1799         &device_attr_host_fcp_output_megabytes.attr,
1800         &device_attr_host_fcp_packet_alloc_failures.attr,
1801         &device_attr_host_fcp_packet_aborts.attr,
1802         &device_attr_host_fcp_frame_alloc_failures.attr,
1803         &device_attr_host_fc_no_free_exch.attr,
1804         &device_attr_host_fc_no_free_exch_xid.attr,
1805         &device_attr_host_fc_xid_not_found.attr,
1806         &device_attr_host_fc_xid_busy.attr,
1807         &device_attr_host_fc_seq_not_found.attr,
1808         &device_attr_host_fc_non_bls_resp.attr,
1809         &device_attr_host_reset_statistics.attr,
1810         NULL
1811 };
1812
1813 static struct attribute_group fc_statistics_group = {
1814         .name = "statistics",
1815         .attrs = fc_statistics_attrs,
1816 };
1817
1818
1819 /* Host Vport Attributes */
1820
1821 static int
1822 fc_parse_wwn(const char *ns, u64 *nm)
1823 {
1824         unsigned int i, j;
1825         u8 wwn[8];
1826
1827         memset(wwn, 0, sizeof(wwn));
1828
1829         /* Validate and store the new name */
1830         for (i=0, j=0; i < 16; i++) {
1831                 int value;
1832
1833                 value = hex_to_bin(*ns++);
1834                 if (value >= 0)
1835                         j = (j << 4) | value;
1836                 else
1837                         return -EINVAL;
1838                 if (i % 2) {
1839                         wwn[i/2] = j & 0xff;
1840                         j = 0;
1841                 }
1842         }
1843
1844         *nm = wwn_to_u64(wwn);
1845
1846         return 0;
1847 }
1848
1849
1850 /*
1851  * "Short-cut" sysfs variable to create a new vport on a FC Host.
1852  * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1853  * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1854  * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1855  */
1856 static ssize_t
1857 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1858                            const char *buf, size_t count)
1859 {
1860         struct Scsi_Host *shost = transport_class_to_shost(dev);
1861         struct fc_vport_identifiers vid;
1862         struct fc_vport *vport;
1863         unsigned int cnt=count;
1864         int stat;
1865
1866         memset(&vid, 0, sizeof(vid));
1867
1868         /* count may include a LF at end of string */
1869         if (buf[cnt-1] == '\n')
1870                 cnt--;
1871
1872         /* validate we have enough characters for WWPN */
1873         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1874                 return -EINVAL;
1875
1876         stat = fc_parse_wwn(&buf[0], &vid.port_name);
1877         if (stat)
1878                 return stat;
1879
1880         stat = fc_parse_wwn(&buf[17], &vid.node_name);
1881         if (stat)
1882                 return stat;
1883
1884         vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1885         vid.vport_type = FC_PORTTYPE_NPIV;
1886         /* vid.symbolic_name is already zero/NULL's */
1887         vid.disable = false;            /* always enabled */
1888
1889         /* we only allow support on Channel 0 !!! */
1890         stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1891         return stat ? stat : count;
1892 }
1893 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1894                         store_fc_host_vport_create);
1895
1896
1897 /*
1898  * "Short-cut" sysfs variable to delete a vport on a FC Host.
1899  * Vport is identified by a string containing "<WWPN>:<WWNN>".
1900  * The WWNs are specified as hex characters, and may *not* contain
1901  * any prefixes (e.g. 0x, x, etc)
1902  */
1903 static ssize_t
1904 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1905                            const char *buf, size_t count)
1906 {
1907         struct Scsi_Host *shost = transport_class_to_shost(dev);
1908         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1909         struct fc_vport *vport;
1910         u64 wwpn, wwnn;
1911         unsigned long flags;
1912         unsigned int cnt=count;
1913         int stat, match;
1914
1915         /* count may include a LF at end of string */
1916         if (buf[cnt-1] == '\n')
1917                 cnt--;
1918
1919         /* validate we have enough characters for WWPN */
1920         if ((cnt != (16+1+16)) || (buf[16] != ':'))
1921                 return -EINVAL;
1922
1923         stat = fc_parse_wwn(&buf[0], &wwpn);
1924         if (stat)
1925                 return stat;
1926
1927         stat = fc_parse_wwn(&buf[17], &wwnn);
1928         if (stat)
1929                 return stat;
1930
1931         spin_lock_irqsave(shost->host_lock, flags);
1932         match = 0;
1933         /* we only allow support on Channel 0 !!! */
1934         list_for_each_entry(vport, &fc_host->vports, peers) {
1935                 if ((vport->channel == 0) &&
1936                     (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1937                         if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1938                                 break;
1939                         vport->flags |= FC_VPORT_DELETING;
1940                         match = 1;
1941                         break;
1942                 }
1943         }
1944         spin_unlock_irqrestore(shost->host_lock, flags);
1945
1946         if (!match)
1947                 return -ENODEV;
1948
1949         stat = fc_vport_terminate(vport);
1950         return stat ? stat : count;
1951 }
1952 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1953                         store_fc_host_vport_delete);
1954
1955
1956 static int fc_host_match(struct attribute_container *cont,
1957                           struct device *dev)
1958 {
1959         struct Scsi_Host *shost;
1960         struct fc_internal *i;
1961
1962         if (!scsi_is_host_device(dev))
1963                 return 0;
1964
1965         shost = dev_to_shost(dev);
1966         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1967             != &fc_host_class.class)
1968                 return 0;
1969
1970         i = to_fc_internal(shost->transportt);
1971
1972         return &i->t.host_attrs.ac == cont;
1973 }
1974
1975 static int fc_target_match(struct attribute_container *cont,
1976                             struct device *dev)
1977 {
1978         struct Scsi_Host *shost;
1979         struct fc_internal *i;
1980
1981         if (!scsi_is_target_device(dev))
1982                 return 0;
1983
1984         shost = dev_to_shost(dev->parent);
1985         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
1986             != &fc_host_class.class)
1987                 return 0;
1988
1989         i = to_fc_internal(shost->transportt);
1990
1991         return &i->t.target_attrs.ac == cont;
1992 }
1993
1994 static void fc_rport_dev_release(struct device *dev)
1995 {
1996         struct fc_rport *rport = dev_to_rport(dev);
1997         put_device(dev->parent);
1998         kfree(rport);
1999 }
2000
2001 int scsi_is_fc_rport(const struct device *dev)
2002 {
2003         return dev->release == fc_rport_dev_release;
2004 }
2005 EXPORT_SYMBOL(scsi_is_fc_rport);
2006
2007 static int fc_rport_match(struct attribute_container *cont,
2008                             struct device *dev)
2009 {
2010         struct Scsi_Host *shost;
2011         struct fc_internal *i;
2012
2013         if (!scsi_is_fc_rport(dev))
2014                 return 0;
2015
2016         shost = dev_to_shost(dev->parent);
2017         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2018             != &fc_host_class.class)
2019                 return 0;
2020
2021         i = to_fc_internal(shost->transportt);
2022
2023         return &i->rport_attr_cont.ac == cont;
2024 }
2025
2026
2027 static void fc_vport_dev_release(struct device *dev)
2028 {
2029         struct fc_vport *vport = dev_to_vport(dev);
2030         put_device(dev->parent);                /* release kobj parent */
2031         kfree(vport);
2032 }
2033
2034 static int scsi_is_fc_vport(const struct device *dev)
2035 {
2036         return dev->release == fc_vport_dev_release;
2037 }
2038
2039 static int fc_vport_match(struct attribute_container *cont,
2040                             struct device *dev)
2041 {
2042         struct fc_vport *vport;
2043         struct Scsi_Host *shost;
2044         struct fc_internal *i;
2045
2046         if (!scsi_is_fc_vport(dev))
2047                 return 0;
2048         vport = dev_to_vport(dev);
2049
2050         shost = vport_to_shost(vport);
2051         if (!shost->transportt  || shost->transportt->host_attrs.ac.class
2052             != &fc_host_class.class)
2053                 return 0;
2054
2055         i = to_fc_internal(shost->transportt);
2056         return &i->vport_attr_cont.ac == cont;
2057 }
2058
2059
2060 /**
2061  * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2062  * @scmd:       The SCSI command which timed out
2063  *
2064  * This routine protects against error handlers getting invoked while a
2065  * rport is in a blocked state, typically due to a temporarily loss of
2066  * connectivity. If the error handlers are allowed to proceed, requests
2067  * to abort i/o, reset the target, etc will likely fail as there is no way
2068  * to communicate with the device to perform the requested function. These
2069  * failures may result in the midlayer taking the device offline, requiring
2070  * manual intervention to restore operation.
2071  *
2072  * This routine, called whenever an i/o times out, validates the state of
2073  * the underlying rport. If the rport is blocked, it returns
2074  * EH_RESET_TIMER, which will continue to reschedule the timeout.
2075  * Eventually, either the device will return, or devloss_tmo will fire,
2076  * and when the timeout then fires, it will be handled normally.
2077  * If the rport is not blocked, normal error handling continues.
2078  *
2079  * Notes:
2080  *      This routine assumes no locks are held on entry.
2081  */
2082 enum blk_eh_timer_return
2083 fc_eh_timed_out(struct scsi_cmnd *scmd)
2084 {
2085         struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2086
2087         if (rport->port_state == FC_PORTSTATE_BLOCKED)
2088                 return BLK_EH_RESET_TIMER;
2089
2090         return BLK_EH_NOT_HANDLED;
2091 }
2092 EXPORT_SYMBOL(fc_eh_timed_out);
2093
2094 /*
2095  * Called by fc_user_scan to locate an rport on the shost that
2096  * matches the channel and target id, and invoke scsi_scan_target()
2097  * on the rport.
2098  */
2099 static void
2100 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2101 {
2102         struct fc_rport *rport;
2103         unsigned long flags;
2104
2105         spin_lock_irqsave(shost->host_lock, flags);
2106
2107         list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2108                 if (rport->scsi_target_id == -1)
2109                         continue;
2110
2111                 if (rport->port_state != FC_PORTSTATE_ONLINE)
2112                         continue;
2113
2114                 if ((channel == rport->channel) &&
2115                     (id == rport->scsi_target_id)) {
2116                         spin_unlock_irqrestore(shost->host_lock, flags);
2117                         scsi_scan_target(&rport->dev, channel, id, lun,
2118                                          SCSI_SCAN_MANUAL);
2119                         return;
2120                 }
2121         }
2122
2123         spin_unlock_irqrestore(shost->host_lock, flags);
2124 }
2125
2126 /*
2127  * Called via sysfs scan routines. Necessary, as the FC transport
2128  * wants to place all target objects below the rport object. So this
2129  * routine must invoke the scsi_scan_target() routine with the rport
2130  * object as the parent.
2131  */
2132 static int
2133 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2134 {
2135         uint chlo, chhi;
2136         uint tgtlo, tgthi;
2137
2138         if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2139             ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2140             ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2141                 return -EINVAL;
2142
2143         if (channel == SCAN_WILD_CARD) {
2144                 chlo = 0;
2145                 chhi = shost->max_channel + 1;
2146         } else {
2147                 chlo = channel;
2148                 chhi = channel + 1;
2149         }
2150
2151         if (id == SCAN_WILD_CARD) {
2152                 tgtlo = 0;
2153                 tgthi = shost->max_id;
2154         } else {
2155                 tgtlo = id;
2156                 tgthi = id + 1;
2157         }
2158
2159         for ( ; chlo < chhi; chlo++)
2160                 for ( ; tgtlo < tgthi; tgtlo++)
2161                         fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2162
2163         return 0;
2164 }
2165
2166 struct scsi_transport_template *
2167 fc_attach_transport(struct fc_function_template *ft)
2168 {
2169         int count;
2170         struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2171                                         GFP_KERNEL);
2172
2173         if (unlikely(!i))
2174                 return NULL;
2175
2176         i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2177         i->t.target_attrs.ac.class = &fc_transport_class.class;
2178         i->t.target_attrs.ac.match = fc_target_match;
2179         i->t.target_size = sizeof(struct fc_starget_attrs);
2180         transport_container_register(&i->t.target_attrs);
2181
2182         i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2183         i->t.host_attrs.ac.class = &fc_host_class.class;
2184         i->t.host_attrs.ac.match = fc_host_match;
2185         i->t.host_size = sizeof(struct fc_host_attrs);
2186         if (ft->get_fc_host_stats)
2187                 i->t.host_attrs.statistics = &fc_statistics_group;
2188         transport_container_register(&i->t.host_attrs);
2189
2190         i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2191         i->rport_attr_cont.ac.class = &fc_rport_class.class;
2192         i->rport_attr_cont.ac.match = fc_rport_match;
2193         transport_container_register(&i->rport_attr_cont);
2194
2195         i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2196         i->vport_attr_cont.ac.class = &fc_vport_class.class;
2197         i->vport_attr_cont.ac.match = fc_vport_match;
2198         transport_container_register(&i->vport_attr_cont);
2199
2200         i->f = ft;
2201
2202         /* Transport uses the shost workq for scsi scanning */
2203         i->t.create_work_queue = 1;
2204
2205         i->t.user_scan = fc_user_scan;
2206
2207         /*
2208          * Setup SCSI Target Attributes.
2209          */
2210         count = 0;
2211         SETUP_STARGET_ATTRIBUTE_RD(node_name);
2212         SETUP_STARGET_ATTRIBUTE_RD(port_name);
2213         SETUP_STARGET_ATTRIBUTE_RD(port_id);
2214
2215         BUG_ON(count > FC_STARGET_NUM_ATTRS);
2216
2217         i->starget_attrs[count] = NULL;
2218
2219
2220         /*
2221          * Setup SCSI Host Attributes.
2222          */
2223         count=0;
2224         SETUP_HOST_ATTRIBUTE_RD(node_name);
2225         SETUP_HOST_ATTRIBUTE_RD(port_name);
2226         SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2227         SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2228         SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2229         SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2230         SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2231         if (ft->vport_create) {
2232                 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2233                 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2234         }
2235         SETUP_HOST_ATTRIBUTE_RD(serial_number);
2236         SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2237         SETUP_HOST_ATTRIBUTE_RD(model);
2238         SETUP_HOST_ATTRIBUTE_RD(model_description);
2239         SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2240         SETUP_HOST_ATTRIBUTE_RD(driver_version);
2241         SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2242         SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2243
2244         SETUP_HOST_ATTRIBUTE_RD(port_id);
2245         SETUP_HOST_ATTRIBUTE_RD(port_type);
2246         SETUP_HOST_ATTRIBUTE_RD(port_state);
2247         SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2248         SETUP_HOST_ATTRIBUTE_RD(speed);
2249         SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2250         SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2251         SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2252
2253         /* Transport-managed attributes */
2254         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2255         SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2256         if (ft->issue_fc_host_lip)
2257                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2258         if (ft->vport_create)
2259                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2260         if (ft->vport_delete)
2261                 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2262
2263         BUG_ON(count > FC_HOST_NUM_ATTRS);
2264
2265         i->host_attrs[count] = NULL;
2266
2267         /*
2268          * Setup Remote Port Attributes.
2269          */
2270         count=0;
2271         SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2272         SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2273         SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2274         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2275         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2276         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2277         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2278         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2279         SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2280         SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2281
2282         BUG_ON(count > FC_RPORT_NUM_ATTRS);
2283
2284         i->rport_attrs[count] = NULL;
2285
2286         /*
2287          * Setup Virtual Port Attributes.
2288          */
2289         count=0;
2290         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2291         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2292         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2293         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2294         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2295         SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2296         SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2297         SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2298         SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2299
2300         BUG_ON(count > FC_VPORT_NUM_ATTRS);
2301
2302         i->vport_attrs[count] = NULL;
2303
2304         return &i->t;
2305 }
2306 EXPORT_SYMBOL(fc_attach_transport);
2307
2308 void fc_release_transport(struct scsi_transport_template *t)
2309 {
2310         struct fc_internal *i = to_fc_internal(t);
2311
2312         transport_container_unregister(&i->t.target_attrs);
2313         transport_container_unregister(&i->t.host_attrs);
2314         transport_container_unregister(&i->rport_attr_cont);
2315         transport_container_unregister(&i->vport_attr_cont);
2316
2317         kfree(i);
2318 }
2319 EXPORT_SYMBOL(fc_release_transport);
2320
2321 /**
2322  * fc_queue_work - Queue work to the fc_host workqueue.
2323  * @shost:      Pointer to Scsi_Host bound to fc_host.
2324  * @work:       Work to queue for execution.
2325  *
2326  * Return value:
2327  *      1 - work queued for execution
2328  *      0 - work is already queued
2329  *      -EINVAL - work queue doesn't exist
2330  */
2331 static int
2332 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2333 {
2334         if (unlikely(!fc_host_work_q(shost))) {
2335                 printk(KERN_ERR
2336                         "ERROR: FC host '%s' attempted to queue work, "
2337                         "when no workqueue created.\n", shost->hostt->name);
2338                 dump_stack();
2339
2340                 return -EINVAL;
2341         }
2342
2343         return queue_work(fc_host_work_q(shost), work);
2344 }
2345
2346 /**
2347  * fc_flush_work - Flush a fc_host's workqueue.
2348  * @shost:      Pointer to Scsi_Host bound to fc_host.
2349  */
2350 static void
2351 fc_flush_work(struct Scsi_Host *shost)
2352 {
2353         if (!fc_host_work_q(shost)) {
2354                 printk(KERN_ERR
2355                         "ERROR: FC host '%s' attempted to flush work, "
2356                         "when no workqueue created.\n", shost->hostt->name);
2357                 dump_stack();
2358                 return;
2359         }
2360
2361         flush_workqueue(fc_host_work_q(shost));
2362 }
2363
2364 /**
2365  * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2366  * @shost:      Pointer to Scsi_Host bound to fc_host.
2367  * @work:       Work to queue for execution.
2368  * @delay:      jiffies to delay the work queuing
2369  *
2370  * Return value:
2371  *      1 on success / 0 already queued / < 0 for error
2372  */
2373 static int
2374 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2375                                 unsigned long delay)
2376 {
2377         if (unlikely(!fc_host_devloss_work_q(shost))) {
2378                 printk(KERN_ERR
2379                         "ERROR: FC host '%s' attempted to queue work, "
2380                         "when no workqueue created.\n", shost->hostt->name);
2381                 dump_stack();
2382
2383                 return -EINVAL;
2384         }
2385
2386         return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2387 }
2388
2389 /**
2390  * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2391  * @shost:      Pointer to Scsi_Host bound to fc_host.
2392  */
2393 static void
2394 fc_flush_devloss(struct Scsi_Host *shost)
2395 {
2396         if (!fc_host_devloss_work_q(shost)) {
2397                 printk(KERN_ERR
2398                         "ERROR: FC host '%s' attempted to flush work, "
2399                         "when no workqueue created.\n", shost->hostt->name);
2400                 dump_stack();
2401                 return;
2402         }
2403
2404         flush_workqueue(fc_host_devloss_work_q(shost));
2405 }
2406
2407
2408 /**
2409  * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2410  * @shost:      Which &Scsi_Host
2411  *
2412  * This routine is expected to be called immediately preceding the
2413  * a driver's call to scsi_remove_host().
2414  *
2415  * WARNING: A driver utilizing the fc_transport, which fails to call
2416  *   this routine prior to scsi_remove_host(), will leave dangling
2417  *   objects in /sys/class/fc_remote_ports. Access to any of these
2418  *   objects can result in a system crash !!!
2419  *
2420  * Notes:
2421  *      This routine assumes no locks are held on entry.
2422  */
2423 void
2424 fc_remove_host(struct Scsi_Host *shost)
2425 {
2426         struct fc_vport *vport = NULL, *next_vport = NULL;
2427         struct fc_rport *rport = NULL, *next_rport = NULL;
2428         struct workqueue_struct *work_q;
2429         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2430         unsigned long flags;
2431
2432         spin_lock_irqsave(shost->host_lock, flags);
2433
2434         /* Remove any vports */
2435         list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2436                 vport->flags |= FC_VPORT_DELETING;
2437                 fc_queue_work(shost, &vport->vport_delete_work);
2438         }
2439
2440         /* Remove any remote ports */
2441         list_for_each_entry_safe(rport, next_rport,
2442                         &fc_host->rports, peers) {
2443                 list_del(&rport->peers);
2444                 rport->port_state = FC_PORTSTATE_DELETED;
2445                 fc_queue_work(shost, &rport->rport_delete_work);
2446         }
2447
2448         list_for_each_entry_safe(rport, next_rport,
2449                         &fc_host->rport_bindings, peers) {
2450                 list_del(&rport->peers);
2451                 rport->port_state = FC_PORTSTATE_DELETED;
2452                 fc_queue_work(shost, &rport->rport_delete_work);
2453         }
2454
2455         spin_unlock_irqrestore(shost->host_lock, flags);
2456
2457         /* flush all scan work items */
2458         scsi_flush_work(shost);
2459
2460         /* flush all stgt delete, and rport delete work items, then kill it  */
2461         if (fc_host->work_q) {
2462                 work_q = fc_host->work_q;
2463                 fc_host->work_q = NULL;
2464                 destroy_workqueue(work_q);
2465         }
2466
2467         /* flush all devloss work items, then kill it  */
2468         if (fc_host->devloss_work_q) {
2469                 work_q = fc_host->devloss_work_q;
2470                 fc_host->devloss_work_q = NULL;
2471                 destroy_workqueue(work_q);
2472         }
2473 }
2474 EXPORT_SYMBOL(fc_remove_host);
2475
2476 static void fc_terminate_rport_io(struct fc_rport *rport)
2477 {
2478         struct Scsi_Host *shost = rport_to_shost(rport);
2479         struct fc_internal *i = to_fc_internal(shost->transportt);
2480
2481         /* Involve the LLDD if possible to terminate all io on the rport. */
2482         if (i->f->terminate_rport_io)
2483                 i->f->terminate_rport_io(rport);
2484
2485         /*
2486          * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2487          */
2488         scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2489 }
2490
2491 /**
2492  * fc_starget_delete - called to delete the scsi descendants of an rport
2493  * @work:       remote port to be operated on.
2494  *
2495  * Deletes target and all sdevs.
2496  */
2497 static void
2498 fc_starget_delete(struct work_struct *work)
2499 {
2500         struct fc_rport *rport =
2501                 container_of(work, struct fc_rport, stgt_delete_work);
2502
2503         fc_terminate_rport_io(rport);
2504         scsi_remove_target(&rport->dev);
2505 }
2506
2507
2508 /**
2509  * fc_rport_final_delete - finish rport termination and delete it.
2510  * @work:       remote port to be deleted.
2511  */
2512 static void
2513 fc_rport_final_delete(struct work_struct *work)
2514 {
2515         struct fc_rport *rport =
2516                 container_of(work, struct fc_rport, rport_delete_work);
2517         struct device *dev = &rport->dev;
2518         struct Scsi_Host *shost = rport_to_shost(rport);
2519         struct fc_internal *i = to_fc_internal(shost->transportt);
2520         unsigned long flags;
2521         int do_callback = 0;
2522
2523         fc_terminate_rport_io(rport);
2524
2525         /*
2526          * if a scan is pending, flush the SCSI Host work_q so that
2527          * that we can reclaim the rport scan work element.
2528          */
2529         if (rport->flags & FC_RPORT_SCAN_PENDING)
2530                 scsi_flush_work(shost);
2531
2532         /*
2533          * Cancel any outstanding timers. These should really exist
2534          * only when rmmod'ing the LLDD and we're asking for
2535          * immediate termination of the rports
2536          */
2537         spin_lock_irqsave(shost->host_lock, flags);
2538         if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2539                 spin_unlock_irqrestore(shost->host_lock, flags);
2540                 if (!cancel_delayed_work(&rport->fail_io_work))
2541                         fc_flush_devloss(shost);
2542                 if (!cancel_delayed_work(&rport->dev_loss_work))
2543                         fc_flush_devloss(shost);
2544                 cancel_work_sync(&rport->scan_work);
2545                 spin_lock_irqsave(shost->host_lock, flags);
2546                 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2547         }
2548         spin_unlock_irqrestore(shost->host_lock, flags);
2549
2550         /* Delete SCSI target and sdevs */
2551         if (rport->scsi_target_id != -1)
2552                 fc_starget_delete(&rport->stgt_delete_work);
2553
2554         /*
2555          * Notify the driver that the rport is now dead. The LLDD will
2556          * also guarantee that any communication to the rport is terminated
2557          *
2558          * Avoid this call if we already called it when we preserved the
2559          * rport for the binding.
2560          */
2561         spin_lock_irqsave(shost->host_lock, flags);
2562         if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2563             (i->f->dev_loss_tmo_callbk)) {
2564                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2565                 do_callback = 1;
2566         }
2567         spin_unlock_irqrestore(shost->host_lock, flags);
2568
2569         if (do_callback)
2570                 i->f->dev_loss_tmo_callbk(rport);
2571
2572         fc_bsg_remove(rport->rqst_q);
2573
2574         transport_remove_device(dev);
2575         device_del(dev);
2576         transport_destroy_device(dev);
2577         scsi_host_put(shost);                   /* for fc_host->rport list */
2578         put_device(dev);                        /* for self-reference */
2579 }
2580
2581
2582 /**
2583  * fc_remote_port_create - allocates and creates a remote FC port.
2584  * @shost:      scsi host the remote port is connected to.
2585  * @channel:    Channel on shost port connected to.
2586  * @ids:        The world wide names, fc address, and FC4 port
2587  *              roles for the remote port.
2588  *
2589  * Allocates and creates the remoter port structure, including the
2590  * class and sysfs creation.
2591  *
2592  * Notes:
2593  *      This routine assumes no locks are held on entry.
2594  */
2595 static struct fc_rport *
2596 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2597                       struct fc_rport_identifiers  *ids)
2598 {
2599         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2600         struct fc_internal *fci = to_fc_internal(shost->transportt);
2601         struct fc_rport *rport;
2602         struct device *dev;
2603         unsigned long flags;
2604         int error;
2605         size_t size;
2606
2607         size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2608         rport = kzalloc(size, GFP_KERNEL);
2609         if (unlikely(!rport)) {
2610                 printk(KERN_ERR "%s: allocation failure\n", __func__);
2611                 return NULL;
2612         }
2613
2614         rport->maxframe_size = -1;
2615         rport->supported_classes = FC_COS_UNSPECIFIED;
2616         rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2617         memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2618         memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2619         rport->port_id = ids->port_id;
2620         rport->roles = ids->roles;
2621         rport->port_state = FC_PORTSTATE_ONLINE;
2622         if (fci->f->dd_fcrport_size)
2623                 rport->dd_data = &rport[1];
2624         rport->channel = channel;
2625         rport->fast_io_fail_tmo = -1;
2626
2627         INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2628         INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2629         INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2630         INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2631         INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2632
2633         spin_lock_irqsave(shost->host_lock, flags);
2634
2635         rport->number = fc_host->next_rport_number++;
2636         if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
2637             (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
2638                 rport->scsi_target_id = fc_host->next_target_id++;
2639         else
2640                 rport->scsi_target_id = -1;
2641         list_add_tail(&rport->peers, &fc_host->rports);
2642         scsi_host_get(shost);                   /* for fc_host->rport list */
2643
2644         spin_unlock_irqrestore(shost->host_lock, flags);
2645
2646         dev = &rport->dev;
2647         device_initialize(dev);                 /* takes self reference */
2648         dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2649         dev->release = fc_rport_dev_release;
2650         dev_set_name(dev, "rport-%d:%d-%d",
2651                      shost->host_no, channel, rport->number);
2652         transport_setup_device(dev);
2653
2654         error = device_add(dev);
2655         if (error) {
2656                 printk(KERN_ERR "FC Remote Port device_add failed\n");
2657                 goto delete_rport;
2658         }
2659         transport_add_device(dev);
2660         transport_configure_device(dev);
2661
2662         fc_bsg_rportadd(shost, rport);
2663         /* ignore any bsg add error - we just can't do sgio */
2664
2665         if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2666                 /* initiate a scan of the target */
2667                 rport->flags |= FC_RPORT_SCAN_PENDING;
2668                 scsi_queue_work(shost, &rport->scan_work);
2669         }
2670
2671         return rport;
2672
2673 delete_rport:
2674         transport_destroy_device(dev);
2675         spin_lock_irqsave(shost->host_lock, flags);
2676         list_del(&rport->peers);
2677         scsi_host_put(shost);                   /* for fc_host->rport list */
2678         spin_unlock_irqrestore(shost->host_lock, flags);
2679         put_device(dev->parent);
2680         kfree(rport);
2681         return NULL;
2682 }
2683
2684 /**
2685  * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2686  * @shost:      scsi host the remote port is connected to.
2687  * @channel:    Channel on shost port connected to.
2688  * @ids:        The world wide names, fc address, and FC4 port
2689  *              roles for the remote port.
2690  *
2691  * The LLDD calls this routine to notify the transport of the existence
2692  * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2693  * of the port, it's FC address (port_id), and the FC4 roles that are
2694  * active for the port.
2695  *
2696  * For ports that are FCP targets (aka scsi targets), the FC transport
2697  * maintains consistent target id bindings on behalf of the LLDD.
2698  * A consistent target id binding is an assignment of a target id to
2699  * a remote port identifier, which persists while the scsi host is
2700  * attached. The remote port can disappear, then later reappear, and
2701  * it's target id assignment remains the same. This allows for shifts
2702  * in FC addressing (if binding by wwpn or wwnn) with no apparent
2703  * changes to the scsi subsystem which is based on scsi host number and
2704  * target id values.  Bindings are only valid during the attachment of
2705  * the scsi host. If the host detaches, then later re-attaches, target
2706  * id bindings may change.
2707  *
2708  * This routine is responsible for returning a remote port structure.
2709  * The routine will search the list of remote ports it maintains
2710  * internally on behalf of consistent target id mappings. If found, the
2711  * remote port structure will be reused. Otherwise, a new remote port
2712  * structure will be allocated.
2713  *
2714  * Whenever a remote port is allocated, a new fc_remote_port class
2715  * device is created.
2716  *
2717  * Should not be called from interrupt context.
2718  *
2719  * Notes:
2720  *      This routine assumes no locks are held on entry.
2721  */
2722 struct fc_rport *
2723 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2724         struct fc_rport_identifiers  *ids)
2725 {
2726         struct fc_internal *fci = to_fc_internal(shost->transportt);
2727         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2728         struct fc_rport *rport;
2729         unsigned long flags;
2730         int match = 0;
2731
2732         /* ensure any stgt delete functions are done */
2733         fc_flush_work(shost);
2734
2735         /*
2736          * Search the list of "active" rports, for an rport that has been
2737          * deleted, but we've held off the real delete while the target
2738          * is in a "blocked" state.
2739          */
2740         spin_lock_irqsave(shost->host_lock, flags);
2741
2742         list_for_each_entry(rport, &fc_host->rports, peers) {
2743
2744                 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
2745                      rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
2746                         (rport->channel == channel)) {
2747
2748                         switch (fc_host->tgtid_bind_type) {
2749                         case FC_TGTID_BIND_BY_WWPN:
2750                         case FC_TGTID_BIND_NONE:
2751                                 if (rport->port_name == ids->port_name)
2752                                         match = 1;
2753                                 break;
2754                         case FC_TGTID_BIND_BY_WWNN:
2755                                 if (rport->node_name == ids->node_name)
2756                                         match = 1;
2757                                 break;
2758                         case FC_TGTID_BIND_BY_ID:
2759                                 if (rport->port_id == ids->port_id)
2760                                         match = 1;
2761                                 break;
2762                         }
2763
2764                         if (match) {
2765
2766                                 memcpy(&rport->node_name, &ids->node_name,
2767                                         sizeof(rport->node_name));
2768                                 memcpy(&rport->port_name, &ids->port_name,
2769                                         sizeof(rport->port_name));
2770                                 rport->port_id = ids->port_id;
2771
2772                                 rport->port_state = FC_PORTSTATE_ONLINE;
2773                                 rport->roles = ids->roles;
2774
2775                                 spin_unlock_irqrestore(shost->host_lock, flags);
2776
2777                                 if (fci->f->dd_fcrport_size)
2778                                         memset(rport->dd_data, 0,
2779                                                 fci->f->dd_fcrport_size);
2780
2781                                 /*
2782                                  * If we were not a target, cancel the
2783                                  * io terminate and rport timers, and
2784                                  * we're done.
2785                                  *
2786                                  * If we were a target, but our new role
2787                                  * doesn't indicate a target, leave the
2788                                  * timers running expecting the role to
2789                                  * change as the target fully logs in. If
2790                                  * it doesn't, the target will be torn down.
2791                                  *
2792                                  * If we were a target, and our role shows
2793                                  * we're still a target, cancel the timers
2794                                  * and kick off a scan.
2795                                  */
2796
2797                                 /* was a target, not in roles */
2798                                 if ((rport->scsi_target_id != -1) &&
2799                                     (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2800                                         return rport;
2801
2802                                 /*
2803                                  * Stop the fail io and dev_loss timers.
2804                                  * If they flush, the port_state will
2805                                  * be checked and will NOOP the function.
2806                                  */
2807                                 if (!cancel_delayed_work(&rport->fail_io_work))
2808                                         fc_flush_devloss(shost);
2809                                 if (!cancel_delayed_work(&rport->dev_loss_work))
2810                                         fc_flush_devloss(shost);
2811
2812                                 spin_lock_irqsave(shost->host_lock, flags);
2813
2814                                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2815                                                   FC_RPORT_DEVLOSS_PENDING |
2816                                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
2817
2818                                 spin_unlock_irqrestore(shost->host_lock, flags);
2819
2820                                 /* if target, initiate a scan */
2821                                 if (rport->scsi_target_id != -1) {
2822                                         scsi_target_unblock(&rport->dev,
2823                                                             SDEV_RUNNING);
2824                                         spin_lock_irqsave(shost->host_lock,
2825                                                           flags);
2826                                         rport->flags |= FC_RPORT_SCAN_PENDING;
2827                                         scsi_queue_work(shost,
2828                                                         &rport->scan_work);
2829                                         spin_unlock_irqrestore(shost->host_lock,
2830                                                         flags);
2831                                 }
2832
2833                                 fc_bsg_goose_queue(rport);
2834
2835                                 return rport;
2836                         }
2837                 }
2838         }
2839
2840         /*
2841          * Search the bindings array
2842          * Note: if never a FCP target, you won't be on this list
2843          */
2844         if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2845
2846                 /* search for a matching consistent binding */
2847
2848                 list_for_each_entry(rport, &fc_host->rport_bindings,
2849                                         peers) {
2850                         if (rport->channel != channel)
2851                                 continue;
2852
2853                         switch (fc_host->tgtid_bind_type) {
2854                         case FC_TGTID_BIND_BY_WWPN:
2855                                 if (rport->port_name == ids->port_name)
2856                                         match = 1;
2857                                 break;
2858                         case FC_TGTID_BIND_BY_WWNN:
2859                                 if (rport->node_name == ids->node_name)
2860                                         match = 1;
2861                                 break;
2862                         case FC_TGTID_BIND_BY_ID:
2863                                 if (rport->port_id == ids->port_id)
2864                                         match = 1;
2865                                 break;
2866                         case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2867                                 break;
2868                         }
2869
2870                         if (match) {
2871                                 list_move_tail(&rport->peers, &fc_host->rports);
2872                                 break;
2873                         }
2874                 }
2875
2876                 if (match) {
2877                         memcpy(&rport->node_name, &ids->node_name,
2878                                 sizeof(rport->node_name));
2879                         memcpy(&rport->port_name, &ids->port_name,
2880                                 sizeof(rport->port_name));
2881                         rport->port_id = ids->port_id;
2882                         rport->port_state = FC_PORTSTATE_ONLINE;
2883                         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2884
2885                         if (fci->f->dd_fcrport_size)
2886                                 memset(rport->dd_data, 0,
2887                                                 fci->f->dd_fcrport_size);
2888                         spin_unlock_irqrestore(shost->host_lock, flags);
2889
2890                         fc_remote_port_rolechg(rport, ids->roles);
2891                         return rport;
2892                 }
2893         }
2894
2895         spin_unlock_irqrestore(shost->host_lock, flags);
2896
2897         /* No consistent binding found - create new remote port entry */
2898         rport = fc_remote_port_create(shost, channel, ids);
2899
2900         return rport;
2901 }
2902 EXPORT_SYMBOL(fc_remote_port_add);
2903
2904
2905 /**
2906  * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2907  * @rport:      The remote port that no longer exists
2908  *
2909  * The LLDD calls this routine to notify the transport that a remote
2910  * port is no longer part of the topology. Note: Although a port
2911  * may no longer be part of the topology, it may persist in the remote
2912  * ports displayed by the fc_host. We do this under 2 conditions:
2913  *
2914  * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2915  *    This allows the port to temporarily disappear, then reappear without
2916  *    disrupting the SCSI device tree attached to it. During the "blocked"
2917  *    period the port will still exist.
2918  *
2919  * 2) If the port was a scsi target and disappears for longer than we
2920  *    expect, we'll delete the port and the tear down the SCSI device tree
2921  *    attached to it. However, we want to semi-persist the target id assigned
2922  *    to that port if it eventually does exist. The port structure will
2923  *    remain (although with minimal information) so that the target id
2924  *    bindings also remain.
2925  *
2926  * If the remote port is not an FCP Target, it will be fully torn down
2927  * and deallocated, including the fc_remote_port class device.
2928  *
2929  * If the remote port is an FCP Target, the port will be placed in a
2930  * temporary blocked state. From the LLDD's perspective, the rport no
2931  * longer exists. From the SCSI midlayer's perspective, the SCSI target
2932  * exists, but all sdevs on it are blocked from further I/O. The following
2933  * is then expected.
2934  *
2935  *   If the remote port does not return (signaled by a LLDD call to
2936  *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2937  *   scsi target is removed - killing all outstanding i/o and removing the
2938  *   scsi devices attached to it. The port structure will be marked Not
2939  *   Present and be partially cleared, leaving only enough information to
2940  *   recognize the remote port relative to the scsi target id binding if
2941  *   it later appears.  The port will remain as long as there is a valid
2942  *   binding (e.g. until the user changes the binding type or unloads the
2943  *   scsi host with the binding).
2944  *
2945  *   If the remote port returns within the dev_loss_tmo value (and matches
2946  *   according to the target id binding type), the port structure will be
2947  *   reused. If it is no longer a SCSI target, the target will be torn
2948  *   down. If it continues to be a SCSI target, then the target will be
2949  *   unblocked (allowing i/o to be resumed), and a scan will be activated
2950  *   to ensure that all luns are detected.
2951  *
2952  * Called from normal process context only - cannot be called from interrupt.
2953  *
2954  * Notes:
2955  *      This routine assumes no locks are held on entry.
2956  */
2957 void
2958 fc_remote_port_delete(struct fc_rport  *rport)
2959 {
2960         struct Scsi_Host *shost = rport_to_shost(rport);
2961         unsigned long timeout = rport->dev_loss_tmo;
2962         unsigned long flags;
2963
2964         /*
2965          * No need to flush the fc_host work_q's, as all adds are synchronous.
2966          *
2967          * We do need to reclaim the rport scan work element, so eventually
2968          * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2969          * there's still a scan pending.
2970          */
2971
2972         spin_lock_irqsave(shost->host_lock, flags);
2973
2974         if (rport->port_state != FC_PORTSTATE_ONLINE) {
2975                 spin_unlock_irqrestore(shost->host_lock, flags);
2976                 return;
2977         }
2978
2979         /*
2980          * In the past, we if this was not an FCP-Target, we would
2981          * unconditionally just jump to deleting the rport.
2982          * However, rports can be used as node containers by the LLDD,
2983          * and its not appropriate to just terminate the rport at the
2984          * first sign of a loss in connectivity. The LLDD may want to
2985          * send ELS traffic to re-validate the login. If the rport is
2986          * immediately deleted, it makes it inappropriate for a node
2987          * container.
2988          * So... we now unconditionally wait dev_loss_tmo before
2989          * destroying an rport.
2990          */
2991
2992         rport->port_state = FC_PORTSTATE_BLOCKED;
2993
2994         rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2995
2996         spin_unlock_irqrestore(shost->host_lock, flags);
2997
2998         scsi_target_block(&rport->dev);
2999
3000         /* see if we need to kill io faster than waiting for device loss */
3001         if ((rport->fast_io_fail_tmo != -1) &&
3002             (rport->fast_io_fail_tmo < timeout))
3003                 fc_queue_devloss_work(shost, &rport->fail_io_work,
3004                                         rport->fast_io_fail_tmo * HZ);
3005
3006         /* cap the length the devices can be blocked until they are deleted */
3007         fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3008 }
3009 EXPORT_SYMBOL(fc_remote_port_delete);
3010
3011 /**
3012  * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3013  * @rport:      The remote port that changed.
3014  * @roles:      New roles for this port.
3015  *
3016  * Description: The LLDD calls this routine to notify the transport that the
3017  * roles on a remote port may have changed. The largest effect of this is
3018  * if a port now becomes a FCP Target, it must be allocated a
3019  * scsi target id.  If the port is no longer a FCP target, any
3020  * scsi target id value assigned to it will persist in case the
3021  * role changes back to include FCP Target. No changes in the scsi
3022  * midlayer will be invoked if the role changes (in the expectation
3023  * that the role will be resumed. If it doesn't normal error processing
3024  * will take place).
3025  *
3026  * Should not be called from interrupt context.
3027  *
3028  * Notes:
3029  *      This routine assumes no locks are held on entry.
3030  */
3031 void
3032 fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
3033 {
3034         struct Scsi_Host *shost = rport_to_shost(rport);
3035         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3036         unsigned long flags;
3037         int create = 0;
3038
3039         spin_lock_irqsave(shost->host_lock, flags);
3040         if (roles & FC_PORT_ROLE_FCP_TARGET) {
3041                 if (rport->scsi_target_id == -1) {
3042                         rport->scsi_target_id = fc_host->next_target_id++;
3043                         create = 1;
3044                 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3045                         create = 1;
3046         }
3047
3048         rport->roles = roles;
3049
3050         spin_unlock_irqrestore(shost->host_lock, flags);
3051
3052         if (create) {
3053                 /*
3054                  * There may have been a delete timer running on the
3055                  * port. Ensure that it is cancelled as we now know
3056                  * the port is an FCP Target.
3057                  * Note: we know the rport exists and is in an online
3058                  *  state as the LLDD would not have had an rport
3059                  *  reference to pass us.
3060                  *
3061                  * Take no action on the del_timer failure as the state
3062                  * machine state change will validate the
3063                  * transaction.
3064                  */
3065                 if (!cancel_delayed_work(&rport->fail_io_work))
3066                         fc_flush_devloss(shost);
3067                 if (!cancel_delayed_work(&rport->dev_loss_work))
3068                         fc_flush_devloss(shost);
3069
3070                 spin_lock_irqsave(shost->host_lock, flags);
3071                 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3072                                   FC_RPORT_DEVLOSS_PENDING |
3073                                   FC_RPORT_DEVLOSS_CALLBK_DONE);
3074                 spin_unlock_irqrestore(shost->host_lock, flags);
3075
3076                 /* ensure any stgt delete functions are done */
3077                 fc_flush_work(shost);
3078
3079                 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3080                 /* initiate a scan of the target */
3081                 spin_lock_irqsave(shost->host_lock, flags);
3082                 rport->flags |= FC_RPORT_SCAN_PENDING;
3083                 scsi_queue_work(shost, &rport->scan_work);
3084                 spin_unlock_irqrestore(shost->host_lock, flags);
3085         }
3086 }
3087 EXPORT_SYMBOL(fc_remote_port_rolechg);
3088
3089 /**
3090  * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3091  * @work:       rport target that failed to reappear in the allotted time.
3092  *
3093  * Description: An attempt to delete a remote port blocks, and if it fails
3094  *              to return in the allotted time this gets called.
3095  */
3096 static void
3097 fc_timeout_deleted_rport(struct work_struct *work)
3098 {
3099         struct fc_rport *rport =
3100                 container_of(work, struct fc_rport, dev_loss_work.work);
3101         struct Scsi_Host *shost = rport_to_shost(rport);
3102         struct fc_internal *i = to_fc_internal(shost->transportt);
3103         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3104         unsigned long flags;
3105         int do_callback = 0;
3106
3107         spin_lock_irqsave(shost->host_lock, flags);
3108
3109         rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3110
3111         /*
3112          * If the port is ONLINE, then it came back. If it was a SCSI
3113          * target, validate it still is. If not, tear down the
3114          * scsi_target on it.
3115          */
3116         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3117             (rport->scsi_target_id != -1) &&
3118             !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3119                 dev_printk(KERN_ERR, &rport->dev,
3120                         "blocked FC remote port time out: no longer"
3121                         " a FCP target, removing starget\n");
3122                 spin_unlock_irqrestore(shost->host_lock, flags);
3123                 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3124                 fc_queue_work(shost, &rport->stgt_delete_work);
3125                 return;
3126         }
3127
3128         /* NOOP state - we're flushing workq's */
3129         if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3130                 spin_unlock_irqrestore(shost->host_lock, flags);
3131                 dev_printk(KERN_ERR, &rport->dev,
3132                         "blocked FC remote port time out: leaving"
3133                         " rport%s alone\n",
3134                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3135                 return;
3136         }
3137
3138         if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3139             (rport->scsi_target_id == -1)) {
3140                 list_del(&rport->peers);
3141                 rport->port_state = FC_PORTSTATE_DELETED;
3142                 dev_printk(KERN_ERR, &rport->dev,
3143                         "blocked FC remote port time out: removing"
3144                         " rport%s\n",
3145                         (rport->scsi_target_id != -1) ?  " and starget" : "");
3146                 fc_queue_work(shost, &rport->rport_delete_work);
3147                 spin_unlock_irqrestore(shost->host_lock, flags);
3148                 return;
3149         }
3150
3151         dev_printk(KERN_ERR, &rport->dev,
3152                 "blocked FC remote port time out: removing target and "
3153                 "saving binding\n");
3154
3155         list_move_tail(&rport->peers, &fc_host->rport_bindings);
3156
3157         /*
3158          * Note: We do not remove or clear the hostdata area. This allows
3159          *   host-specific target data to persist along with the
3160          *   scsi_target_id. It's up to the host to manage it's hostdata area.
3161          */
3162
3163         /*
3164          * Reinitialize port attributes that may change if the port comes back.
3165          */
3166         rport->maxframe_size = -1;
3167         rport->supported_classes = FC_COS_UNSPECIFIED;
3168         rport->roles = FC_PORT_ROLE_UNKNOWN;
3169         rport->port_state = FC_PORTSTATE_NOTPRESENT;
3170         rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3171
3172         /*
3173          * Pre-emptively kill I/O rather than waiting for the work queue
3174          * item to teardown the starget. (FCOE libFC folks prefer this
3175          * and to have the rport_port_id still set when it's done).
3176          */
3177         spin_unlock_irqrestore(shost->host_lock, flags);
3178         fc_terminate_rport_io(rport);
3179
3180         spin_lock_irqsave(shost->host_lock, flags);
3181
3182         if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {     /* still missing */
3183
3184                 /* remove the identifiers that aren't used in the consisting binding */
3185                 switch (fc_host->tgtid_bind_type) {
3186                 case FC_TGTID_BIND_BY_WWPN:
3187                         rport->node_name = -1;
3188                         rport->port_id = -1;
3189                         break;
3190                 case FC_TGTID_BIND_BY_WWNN:
3191                         rport->port_name = -1;
3192                         rport->port_id = -1;
3193                         break;
3194                 case FC_TGTID_BIND_BY_ID:
3195                         rport->node_name = -1;
3196                         rport->port_name = -1;
3197                         break;
3198                 case FC_TGTID_BIND_NONE:        /* to keep compiler happy */
3199                         break;
3200                 }
3201
3202                 /*
3203                  * As this only occurs if the remote port (scsi target)
3204                  * went away and didn't come back - we'll remove
3205                  * all attached scsi devices.
3206                  */
3207                 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3208                 fc_queue_work(shost, &rport->stgt_delete_work);
3209
3210                 do_callback = 1;
3211         }
3212
3213         spin_unlock_irqrestore(shost->host_lock, flags);
3214
3215         /*
3216          * Notify the driver that the rport is now dead. The LLDD will
3217          * also guarantee that any communication to the rport is terminated
3218          *
3219          * Note: we set the CALLBK_DONE flag above to correspond
3220          */
3221         if (do_callback && i->f->dev_loss_tmo_callbk)
3222                 i->f->dev_loss_tmo_callbk(rport);
3223 }
3224
3225
3226 /**
3227  * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3228  * @work:       rport to terminate io on.
3229  *
3230  * Notes: Only requests the failure of the io, not that all are flushed
3231  *    prior to returning.
3232  */
3233 static void
3234 fc_timeout_fail_rport_io(struct work_struct *work)
3235 {
3236         struct fc_rport *rport =
3237                 container_of(work, struct fc_rport, fail_io_work.work);
3238
3239         if (rport->port_state != FC_PORTSTATE_BLOCKED)
3240                 return;
3241
3242         rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3243         fc_terminate_rport_io(rport);
3244 }
3245
3246 /**
3247  * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3248  * @work:       remote port to be scanned.
3249  */
3250 static void
3251 fc_scsi_scan_rport(struct work_struct *work)
3252 {
3253         struct fc_rport *rport =
3254                 container_of(work, struct fc_rport, scan_work);
3255         struct Scsi_Host *shost = rport_to_shost(rport);
3256         struct fc_internal *i = to_fc_internal(shost->transportt);
3257         unsigned long flags;
3258
3259         if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3260             (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3261             !(i->f->disable_target_scan)) {
3262                 scsi_scan_target(&rport->dev, rport->channel,
3263                                  rport->scsi_target_id, SCAN_WILD_CARD,
3264                                  SCSI_SCAN_RESCAN);
3265         }
3266
3267         spin_lock_irqsave(shost->host_lock, flags);
3268         rport->flags &= ~FC_RPORT_SCAN_PENDING;
3269         spin_unlock_irqrestore(shost->host_lock, flags);
3270 }
3271
3272 /**
3273  * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3274  * @rport: Remote port that scsi_eh is trying to recover.
3275  *
3276  * This routine can be called from a FC LLD scsi_eh callback. It
3277  * blocks the scsi_eh thread until the fc_rport leaves the
3278  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3279  * necessary to avoid the scsi_eh failing recovery actions for blocked
3280  * rports which would lead to offlined SCSI devices.
3281  *
3282  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3283  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3284  *          passed back to scsi_eh.
3285  */
3286 int fc_block_rport(struct fc_rport *rport)
3287 {
3288         struct Scsi_Host *shost = rport_to_shost(rport);
3289         unsigned long flags;
3290
3291         spin_lock_irqsave(shost->host_lock, flags);
3292         while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3293                !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3294                 spin_unlock_irqrestore(shost->host_lock, flags);
3295                 msleep(1000);
3296                 spin_lock_irqsave(shost->host_lock, flags);
3297         }
3298         spin_unlock_irqrestore(shost->host_lock, flags);
3299
3300         if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3301                 return FAST_IO_FAIL;
3302
3303         return 0;
3304 }
3305 EXPORT_SYMBOL(fc_block_rport);
3306
3307 /**
3308  * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3309  * @cmnd: SCSI command that scsi_eh is trying to recover
3310  *
3311  * This routine can be called from a FC LLD scsi_eh callback. It
3312  * blocks the scsi_eh thread until the fc_rport leaves the
3313  * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3314  * necessary to avoid the scsi_eh failing recovery actions for blocked
3315  * rports which would lead to offlined SCSI devices.
3316  *
3317  * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3318  *          FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3319  *          passed back to scsi_eh.
3320  */
3321 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3322 {
3323         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3324
3325         if (WARN_ON_ONCE(!rport))
3326                 return FAST_IO_FAIL;
3327
3328         return fc_block_rport(rport);
3329 }
3330 EXPORT_SYMBOL(fc_block_scsi_eh);
3331
3332 /**
3333  * fc_vport_setup - allocates and creates a FC virtual port.
3334  * @shost:      scsi host the virtual port is connected to.
3335  * @channel:    Channel on shost port connected to.
3336  * @pdev:       parent device for vport
3337  * @ids:        The world wide names, FC4 port roles, etc for
3338  *              the virtual port.
3339  * @ret_vport:  The pointer to the created vport.
3340  *
3341  * Allocates and creates the vport structure, calls the parent host
3342  * to instantiate the vport, this completes w/ class and sysfs creation.
3343  *
3344  * Notes:
3345  *      This routine assumes no locks are held on entry.
3346  */
3347 static int
3348 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3349         struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
3350 {
3351         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3352         struct fc_internal *fci = to_fc_internal(shost->transportt);
3353         struct fc_vport *vport;
3354         struct device *dev;
3355         unsigned long flags;
3356         size_t size;
3357         int error;
3358
3359         *ret_vport = NULL;
3360
3361         if ( ! fci->f->vport_create)
3362                 return -ENOENT;
3363
3364         size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3365         vport = kzalloc(size, GFP_KERNEL);
3366         if (unlikely(!vport)) {
3367                 printk(KERN_ERR "%s: allocation failure\n", __func__);
3368                 return -ENOMEM;
3369         }
3370
3371         vport->vport_state = FC_VPORT_UNKNOWN;
3372         vport->vport_last_state = FC_VPORT_UNKNOWN;
3373         vport->node_name = ids->node_name;
3374         vport->port_name = ids->port_name;
3375         vport->roles = ids->roles;
3376         vport->vport_type = ids->vport_type;
3377         if (fci->f->dd_fcvport_size)
3378                 vport->dd_data = &vport[1];
3379         vport->shost = shost;
3380         vport->channel = channel;
3381         vport->flags = FC_VPORT_CREATING;
3382         INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3383
3384         spin_lock_irqsave(shost->host_lock, flags);
3385
3386         if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3387                 spin_unlock_irqrestore(shost->host_lock, flags);
3388                 kfree(vport);
3389                 return -ENOSPC;
3390         }
3391         fc_host->npiv_vports_inuse++;
3392         vport->number = fc_host->next_vport_number++;
3393         list_add_tail(&vport->peers, &fc_host->vports);
3394         scsi_host_get(shost);                   /* for fc_host->vport list */
3395
3396         spin_unlock_irqrestore(shost->host_lock, flags);
3397
3398         dev = &vport->dev;
3399         device_initialize(dev);                 /* takes self reference */
3400         dev->parent = get_device(pdev);         /* takes parent reference */
3401         dev->release = fc_vport_dev_release;
3402         dev_set_name(dev, "vport-%d:%d-%d",
3403                      shost->host_no, channel, vport->number);
3404         transport_setup_device(dev);
3405
3406         error = device_add(dev);
3407         if (error) {
3408                 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3409                 goto delete_vport;
3410         }
3411         transport_add_device(dev);
3412         transport_configure_device(dev);
3413
3414         error = fci->f->vport_create(vport, ids->disable);
3415         if (error) {
3416                 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3417                 goto delete_vport_all;
3418         }
3419
3420         /*
3421          * if the parent isn't the physical adapter's Scsi_Host, ensure
3422          * the Scsi_Host at least contains a symlink to the vport.
3423          */
3424         if (pdev != &shost->shost_gendev) {
3425                 error = sysfs_create_link(&shost->shost_gendev.kobj,
3426                                  &dev->kobj, dev_name(dev));
3427                 if (error)
3428                         printk(KERN_ERR
3429                                 "%s: Cannot create vport symlinks for "
3430                                 "%s, err=%d\n",
3431                                 __func__, dev_name(dev), error);
3432         }
3433         spin_lock_irqsave(shost->host_lock, flags);
3434         vport->flags &= ~FC_VPORT_CREATING;
3435         spin_unlock_irqrestore(shost->host_lock, flags);
3436
3437         dev_printk(KERN_NOTICE, pdev,
3438                         "%s created via shost%d channel %d\n", dev_name(dev),
3439                         shost->host_no, channel);
3440
3441         *ret_vport = vport;
3442
3443         return 0;
3444
3445 delete_vport_all:
3446         transport_remove_device(dev);
3447         device_del(dev);
3448 delete_vport:
3449         transport_destroy_device(dev);
3450         spin_lock_irqsave(shost->host_lock, flags);
3451         list_del(&vport->peers);
3452         scsi_host_put(shost);                   /* for fc_host->vport list */
3453         fc_host->npiv_vports_inuse--;
3454         spin_unlock_irqrestore(shost->host_lock, flags);
3455         put_device(dev->parent);
3456         kfree(vport);
3457
3458         return error;
3459 }
3460
3461 /**
3462  * fc_vport_create - Admin App or LLDD requests creation of a vport
3463  * @shost:      scsi host the virtual port is connected to.
3464  * @channel:    channel on shost port connected to.
3465  * @ids:        The world wide names, FC4 port roles, etc for
3466  *              the virtual port.
3467  *
3468  * Notes:
3469  *      This routine assumes no locks are held on entry.
3470  */
3471 struct fc_vport *
3472 fc_vport_create(struct Scsi_Host *shost, int channel,
3473         struct fc_vport_identifiers *ids)
3474 {
3475         int stat;
3476         struct fc_vport *vport;
3477
3478         stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3479                  ids, &vport);
3480         return stat ? NULL : vport;
3481 }
3482 EXPORT_SYMBOL(fc_vport_create);
3483
3484 /**
3485  * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3486  * @vport:      fc_vport to be terminated
3487  *
3488  * Calls the LLDD vport_delete() function, then deallocates and removes
3489  * the vport from the shost and object tree.
3490  *
3491  * Notes:
3492  *      This routine assumes no locks are held on entry.
3493  */
3494 int
3495 fc_vport_terminate(struct fc_vport *vport)
3496 {
3497         struct Scsi_Host *shost = vport_to_shost(vport);
3498         struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3499         struct fc_internal *i = to_fc_internal(shost->transportt);
3500         struct device *dev = &vport->dev;
3501         unsigned long flags;
3502         int stat;
3503
3504         if (i->f->vport_delete)
3505                 stat = i->f->vport_delete(vport);
3506         else
3507                 stat = -ENOENT;
3508
3509         spin_lock_irqsave(shost->host_lock, flags);
3510         vport->flags &= ~FC_VPORT_DELETING;
3511         if (!stat) {
3512                 vport->flags |= FC_VPORT_DELETED;
3513                 list_del(&vport->peers);
3514                 fc_host->npiv_vports_inuse--;
3515                 scsi_host_put(shost);           /* for fc_host->vport list */
3516         }
3517         spin_unlock_irqrestore(shost->host_lock, flags);
3518
3519         if (stat)
3520                 return stat;
3521
3522         if (dev->parent != &shost->shost_gendev)
3523                 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3524         transport_remove_device(dev);
3525         device_del(dev);
3526         transport_destroy_device(dev);
3527
3528         /*
3529          * Removing our self-reference should mean our
3530          * release function gets called, which will drop the remaining
3531          * parent reference and free the data structure.
3532          */
3533         put_device(dev);                        /* for self-reference */
3534
3535         return 0; /* SUCCESS */
3536 }
3537 EXPORT_SYMBOL(fc_vport_terminate);
3538
3539 /**
3540  * fc_vport_sched_delete - workq-based delete request for a vport
3541  * @work:       vport to be deleted.
3542  */
3543 static void
3544 fc_vport_sched_delete(struct work_struct *work)
3545 {
3546         struct fc_vport *vport =
3547                 container_of(work, struct fc_vport, vport_delete_work);
3548         int stat;
3549
3550         stat = fc_vport_terminate(vport);
3551         if (stat)
3552                 dev_printk(KERN_ERR, vport->dev.parent,
3553                         "%s: %s could not be deleted created via "
3554                         "shost%d channel %d - error %d\n", __func__,
3555                         dev_name(&vport->dev), vport->shost->host_no,
3556                         vport->channel, stat);
3557 }
3558
3559
3560 /*
3561  * BSG support
3562  */
3563
3564 /**
3565  * fc_bsg_job_timeout - handler for when a bsg request timesout
3566  * @req:        request that timed out
3567  */
3568 static enum blk_eh_timer_return
3569 fc_bsg_job_timeout(struct request *req)
3570 {
3571         struct bsg_job *job = blk_mq_rq_to_pdu(req);
3572         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3573         struct fc_rport *rport = fc_bsg_to_rport(job);
3574         struct fc_internal *i = to_fc_internal(shost->transportt);
3575         int err = 0, inflight = 0;
3576
3577         if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3578                 return BLK_EH_RESET_TIMER;
3579
3580         inflight = bsg_job_get(job);
3581
3582         if (inflight && i->f->bsg_timeout) {
3583                 /* call LLDD to abort the i/o as it has timed out */
3584                 err = i->f->bsg_timeout(job);
3585                 if (err == -EAGAIN) {
3586                         bsg_job_put(job);
3587                         return BLK_EH_RESET_TIMER;
3588                 } else if (err)
3589                         printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3590                                 "abort failed with status %d\n", err);
3591         }
3592
3593         /* the blk_end_sync_io() doesn't check the error */
3594         if (!inflight)
3595                 return BLK_EH_NOT_HANDLED;
3596         else
3597                 return BLK_EH_HANDLED;
3598 }
3599
3600 /**
3601  * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3602  * @shost:      scsi host rport attached to
3603  * @job:        bsg job to be processed
3604  */
3605 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3606 {
3607         struct fc_internal *i = to_fc_internal(shost->transportt);
3608         struct fc_bsg_request *bsg_request = job->request;
3609         struct fc_bsg_reply *bsg_reply = job->reply;
3610         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3611         int ret;
3612
3613         /* check if we really have all the request data needed */
3614         if (job->request_len < cmdlen) {
3615                 ret = -ENOMSG;
3616                 goto fail_host_msg;
3617         }
3618
3619         /* Validate the host command */
3620         switch (bsg_request->msgcode) {
3621         case FC_BSG_HST_ADD_RPORT:
3622                 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3623                 break;
3624
3625         case FC_BSG_HST_DEL_RPORT:
3626                 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3627                 break;
3628
3629         case FC_BSG_HST_ELS_NOLOGIN:
3630                 cmdlen += sizeof(struct fc_bsg_host_els);
3631                 /* there better be a xmt and rcv payloads */
3632                 if ((!job->request_payload.payload_len) ||
3633                     (!job->reply_payload.payload_len)) {
3634                         ret = -EINVAL;
3635                         goto fail_host_msg;
3636                 }
3637                 break;
3638
3639         case FC_BSG_HST_CT:
3640                 cmdlen += sizeof(struct fc_bsg_host_ct);
3641                 /* there better be xmt and rcv payloads */
3642                 if ((!job->request_payload.payload_len) ||
3643                     (!job->reply_payload.payload_len)) {
3644                         ret = -EINVAL;
3645                         goto fail_host_msg;
3646                 }
3647                 break;
3648
3649         case FC_BSG_HST_VENDOR:
3650                 cmdlen += sizeof(struct fc_bsg_host_vendor);
3651                 if ((shost->hostt->vendor_id == 0L) ||
3652                     (bsg_request->rqst_data.h_vendor.vendor_id !=
3653                         shost->hostt->vendor_id)) {
3654                         ret = -ESRCH;
3655                         goto fail_host_msg;
3656                 }
3657                 break;
3658
3659         default:
3660                 ret = -EBADR;
3661                 goto fail_host_msg;
3662         }
3663
3664         ret = i->f->bsg_request(job);
3665         if (!ret)
3666                 return 0;
3667
3668 fail_host_msg:
3669         /* return the errno failure code as the only status */
3670         BUG_ON(job->reply_len < sizeof(uint32_t));
3671         bsg_reply->reply_payload_rcv_len = 0;
3672         bsg_reply->result = ret;
3673         job->reply_len = sizeof(uint32_t);
3674         bsg_job_done(job, bsg_reply->result,
3675                        bsg_reply->reply_payload_rcv_len);
3676         return 0;
3677 }
3678
3679
3680 /*
3681  * fc_bsg_goose_queue - restart rport queue in case it was stopped
3682  * @rport:      rport to be restarted
3683  */
3684 static void
3685 fc_bsg_goose_queue(struct fc_rport *rport)
3686 {
3687         struct request_queue *q = rport->rqst_q;
3688         unsigned long flags;
3689
3690         if (!q)
3691                 return;
3692
3693         spin_lock_irqsave(q->queue_lock, flags);
3694         blk_run_queue_async(q);
3695         spin_unlock_irqrestore(q->queue_lock, flags);
3696 }
3697
3698 /**
3699  * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3700  * @shost:      scsi host rport attached to
3701  * @job:        bsg job to be processed
3702  */
3703 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3704 {
3705         struct fc_internal *i = to_fc_internal(shost->transportt);
3706         struct fc_bsg_request *bsg_request = job->request;
3707         struct fc_bsg_reply *bsg_reply = job->reply;
3708         int cmdlen = sizeof(uint32_t);  /* start with length of msgcode */
3709         int ret;
3710
3711         /* check if we really have all the request data needed */
3712         if (job->request_len < cmdlen) {
3713                 ret = -ENOMSG;
3714                 goto fail_rport_msg;
3715         }
3716
3717         /* Validate the rport command */
3718         switch (bsg_request->msgcode) {
3719         case FC_BSG_RPT_ELS:
3720                 cmdlen += sizeof(struct fc_bsg_rport_els);
3721                 goto check_bidi;
3722
3723         case FC_BSG_RPT_CT:
3724                 cmdlen += sizeof(struct fc_bsg_rport_ct);
3725 check_bidi:
3726                 /* there better be xmt and rcv payloads */
3727                 if ((!job->request_payload.payload_len) ||
3728                     (!job->reply_payload.payload_len)) {
3729                         ret = -EINVAL;
3730                         goto fail_rport_msg;
3731                 }
3732                 break;
3733         default:
3734                 ret = -EBADR;
3735                 goto fail_rport_msg;
3736         }
3737
3738         ret = i->f->bsg_request(job);
3739         if (!ret)
3740                 return 0;
3741
3742 fail_rport_msg:
3743         /* return the errno failure code as the only status */
3744         BUG_ON(job->reply_len < sizeof(uint32_t));
3745         bsg_reply->reply_payload_rcv_len = 0;
3746         bsg_reply->result = ret;
3747         job->reply_len = sizeof(uint32_t);
3748         bsg_job_done(job, bsg_reply->result,
3749                        bsg_reply->reply_payload_rcv_len);
3750         return 0;
3751 }
3752
3753 static int fc_bsg_dispatch(struct bsg_job *job)
3754 {
3755         struct Scsi_Host *shost = fc_bsg_to_shost(job);
3756
3757         if (scsi_is_fc_rport(job->dev))
3758                 return fc_bsg_rport_dispatch(shost, job);
3759         else
3760                 return fc_bsg_host_dispatch(shost, job);
3761 }
3762
3763 /**
3764  * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3765  * @shost:      shost for fc_host
3766  * @fc_host:    fc_host adding the structures to
3767  */
3768 static int
3769 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3770 {
3771         struct device *dev = &shost->shost_gendev;
3772         struct fc_internal *i = to_fc_internal(shost->transportt);
3773         struct request_queue *q;
3774         char bsg_name[20];
3775
3776         fc_host->rqst_q = NULL;
3777
3778         if (!i->f->bsg_request)
3779                 return -ENOTSUPP;
3780
3781         snprintf(bsg_name, sizeof(bsg_name),
3782                  "fc_host%d", shost->host_no);
3783
3784         q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size,
3785                         NULL);
3786         if (IS_ERR(q)) {
3787                 dev_err(dev,
3788                         "fc_host%d: bsg interface failed to initialize - setup queue\n",
3789                         shost->host_no);
3790                 return PTR_ERR(q);
3791         }
3792         __scsi_init_queue(shost, q);
3793         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3794         blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3795         fc_host->rqst_q = q;
3796         return 0;
3797 }
3798
3799 static int fc_bsg_rport_prep(struct request_queue *q, struct request *req)
3800 {
3801         struct fc_rport *rport = dev_to_rport(q->queuedata);
3802
3803         if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3804             !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3805                 return BLKPREP_DEFER;
3806
3807         if (rport->port_state != FC_PORTSTATE_ONLINE)
3808                 return BLKPREP_KILL;
3809
3810         return BLKPREP_OK;
3811 }
3812
3813 /**
3814  * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3815  * @shost:      shost that rport is attached to
3816  * @rport:      rport that the bsg hooks are being attached to
3817  */
3818 static int
3819 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3820 {
3821         struct device *dev = &rport->dev;
3822         struct fc_internal *i = to_fc_internal(shost->transportt);
3823         struct request_queue *q;
3824
3825         rport->rqst_q = NULL;
3826
3827         if (!i->f->bsg_request)
3828                 return -ENOTSUPP;
3829
3830         q = bsg_setup_queue(dev, NULL, fc_bsg_dispatch, i->f->dd_bsg_size,
3831                         NULL);
3832         if (IS_ERR(q)) {
3833                 dev_err(dev, "failed to setup bsg queue\n");
3834                 return PTR_ERR(q);
3835         }
3836         __scsi_init_queue(shost, q);
3837         blk_queue_prep_rq(q, fc_bsg_rport_prep);
3838         blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3839         blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3840         rport->rqst_q = q;
3841         return 0;
3842 }
3843
3844
3845 /**
3846  * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3847  * @q:  the request_queue that is to be torn down.
3848  *
3849  * Notes:
3850  *   Before unregistering the queue empty any requests that are blocked
3851  *
3852  *
3853  */
3854 static void
3855 fc_bsg_remove(struct request_queue *q)
3856 {
3857         if (q) {
3858                 bsg_unregister_queue(q);
3859                 blk_cleanup_queue(q);
3860         }
3861 }
3862
3863
3864 /* Original Author:  Martin Hicks */
3865 MODULE_AUTHOR("James Smart");
3866 MODULE_DESCRIPTION("FC Transport Attributes");
3867 MODULE_LICENSE("GPL");
3868
3869 module_init(fc_transport_init);
3870 module_exit(fc_transport_exit);